rainbutterfly/cve_corpus huggingface dataset:
CVE-2026-40358 Microsoft Office Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-416
description: CWE-416: Use After Free
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Office 2016
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.4
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:17.162Z
CVE-2026-40359 Microsoft Excel Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-416
description: CWE-416: Use After Free
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Excel 2016
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Office Online Server
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:17.927Z
CVE-2026-40360 Microsoft Excel Information Disclosure Vulnerability
Problem types: cwe_id: CWE-125
description: CWE-125: Out-of-bounds Read
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Excel 2016
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Office Online Server
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:36.923Z
CVE-2026-40361 Microsoft Outlook and Word Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-416
description: CWE-416: Use After Free
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Microsoft Word 2016
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.4
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:18.607Z
CVE-2026-40362 Microsoft Excel Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-122
description: CWE-122: Heap-based Buffer Overflow
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Excel 2016
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Office Online Server
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:19.192Z
CVE-2026-40363 Microsoft Office Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-122
description: CWE-122: Heap-based Buffer Overflow
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Office 2016
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office for Android
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.4
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:37.547Z
CVE-2026-40364 Microsoft Word Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-843
description: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
cwe_id: CWE-908
description: CWE-908: Use of Uninitialized Resource
cwe_id: CWE-122
description: CWE-122: Heap-based Buffer Overflow
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Microsoft Word 2016
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.4
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:38.335Z
CVE-2026-40365 Microsoft SharePoint Server Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-1220
description: CWE-1220: Insufficient Granularity of Access Control
Affected products: vendor: Microsoft
product: Microsoft SharePoint Enterprise Server 2016
vendor: Microsoft
product: Microsoft SharePoint Server 2019
vendor: Microsoft
product: Microsoft SharePoint Server Subscription Edition
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:19.761Z
CVE-2026-40366 Microsoft Word Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-416
description: CWE-416: Use After Free
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Microsoft Word 2016
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.4
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:38.928Z
CVE-2026-40367 Microsoft Word Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-822
description: CWE-822: Untrusted Pointer Dereference
Affected products: vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
vendor: Microsoft
product: Microsoft Office 2019
vendor: Microsoft
product: Microsoft Office LTSC 2021
vendor: Microsoft
product: Microsoft Office LTSC 2024
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2021
vendor: Microsoft
product: Microsoft Office LTSC for Mac 2024
vendor: Microsoft
product: Microsoft SharePoint Enterprise Server 2016
vendor: Microsoft
product: Microsoft SharePoint Server 2019
vendor: Microsoft
product: Microsoft SharePoint Server Subscription Edition
vendor: Microsoft
product: Microsoft Word 2016
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.4
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:20.388Z
CVE-2026-40368 Microsoft SharePoint Server Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-502
description: CWE-502: Deserialization of Untrusted Data
Affected products: vendor: Microsoft
product: Microsoft SharePoint Enterprise Server 2016
vendor: Microsoft
product: Microsoft SharePoint Server 2019
vendor: Microsoft
product: Microsoft SharePoint Server Subscription Edition
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:39.559Z
CVE-2026-40369 Windows Kernel Elevation of Privilege Vulnerability
Problem types: cwe_id: CWE-822
description: CWE-822: Untrusted Pointer Dereference
Affected products: vendor: Microsoft
product: Windows 11 Version 24H2
vendor: Microsoft
product: Windows 11 Version 25H2
vendor: Microsoft
product: Windows 11 version 26H1
vendor: Microsoft
product: Windows Server 2025
vendor: Microsoft
product: Windows Server 2025 (Server Core installation)
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:21.712Z
CVE-2026-40370 SQL Server Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-73
description: CWE-73: External Control of File Name or Path
Affected products: vendor: Microsoft
product: Microsoft SQL Server 2016 Service Pack 3 (GDR)
vendor: Microsoft
product: Microsoft SQL Server 2016 Service Pack 3 Azure Connect Feature Pack
vendor: Microsoft
product: Microsoft SQL Server 2017 (CU 31)
vendor: Microsoft
product: Microsoft SQL Server 2017 (GDR)
vendor: Microsoft
product: Microsoft SQL Server 2019 (CU 32)
vendor: Microsoft
product: Microsoft SQL Server 2019 (GDR)
vendor: Microsoft
product: Microsoft SQL Server 2022 (GDR)
vendor: Microsoft
product: Microsoft SQL Server 2022 for x64-based Systems (CU 24)
vendor: Microsoft
product: Microsoft SQL Server 2025 (CU 4)
vendor: Microsoft
product: Microsoft SQL Server 2025 for x64-based Systems (GDR)
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 8.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:21.097Z
CVE-2026-40372 ASP.NET Core Elevation of Privilege Vulnerability
Problem types: cwe_id: CWE-347
description: CWE-347: Improper Verification of Cryptographic Signature
Affected products: vendor: Microsoft
product: ASP.NET Core 10.0
vendor: Microsoft
product: Microsoft Visual Studio 2026 version 18.5
CVSS v3.1: version: 3.1
baseSeverity: CRITICAL
baseScore: 9.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
Published: 2026-04-21T19:20:50.215Z
CVE-2026-40374 Microsoft Power Automate Desktop Information Disclosure Vulnerability
Problem types: cwe_id: CWE-200
description: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected products: vendor: Microsoft
product: Power Automate for Desktop
CVSS v3.1: version: 3.1
baseSeverity: MEDIUM
baseScore: 6.5
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:40.061Z
CVE-2026-40377 Microsoft Cryptographic Services Elevation of Privilege Vulnerability
Problem types: cwe_id: CWE-122
description: CWE-122: Heap-based Buffer Overflow
Affected products: vendor: Microsoft
product: Windows 10 Version 1607
vendor: Microsoft
product: Windows 10 Version 1809
vendor: Microsoft
product: Windows 10 Version 21H2
vendor: Microsoft
product: Windows 10 Version 22H2
vendor: Microsoft
product: Windows 11 version 23H2
vendor: Microsoft
product: Windows 11 Version 23H2
vendor: Microsoft
product: Windows 11 Version 24H2
vendor: Microsoft
product: Windows 11 Version 25H2
vendor: Microsoft
product: Windows 11 version 26H1
vendor: Microsoft
product: Windows Server 2012
vendor: Microsoft
product: Windows Server 2012 (Server Core installation)
vendor: Microsoft
product: Windows Server 2012 R2
vendor: Microsoft
product: Windows Server 2012 R2 (Server Core installation)
vendor: Microsoft
product: Windows Server 2016
vendor: Microsoft
product: Windows Server 2016 (Server Core installation)
vendor: Microsoft
product: Windows Server 2019
vendor: Microsoft
product: Windows Server 2019 (Server Core installation)
vendor: Microsoft
product: Windows Server 2022
vendor: Microsoft
product: Windows Server 2022, 23H2 Edition (Server Core installation)
vendor: Microsoft
product: Windows Server 2025
vendor: Microsoft
product: Windows Server 2025 (Server Core installation)
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:40.526Z
CVE-2026-40379 Azure Entra ID Spoofing Vulnerability
Problem types: cwe_id: CWE-200
description: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected products: vendor: Microsoft
product: Microsoft Entra
CVSS v3.1: version: 3.1
baseSeverity: CRITICAL
baseScore: 9.3
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:10.399Z
CVE-2026-40380 Windows Volume Manager Extension Driver Remote Code Execution Vulnerability
Problem types: cwe_id: CWE-122
description: CWE-122: Heap-based Buffer Overflow
cwe_id: CWE-125
description: CWE-125: Out-of-bounds Read
cwe_id: CWE-197
description: CWE-197: Numeric Truncation Error
Affected products: vendor: Microsoft
product: Windows 10 Version 1607
vendor: Microsoft
product: Windows 10 Version 1809
vendor: Microsoft
product: Windows 10 Version 21H2
vendor: Microsoft
product: Windows 10 Version 22H2
vendor: Microsoft
product: Windows 11 version 23H2
vendor: Microsoft
product: Windows 11 Version 23H2
vendor: Microsoft
product: Windows 11 Version 24H2
vendor: Microsoft
product: Windows 11 Version 25H2
vendor: Microsoft
product: Windows 11 version 26H1
vendor: Microsoft
product: Windows Server 2012
vendor: Microsoft
product: Windows Server 2012 (Server Core installation)
vendor: Microsoft
product: Windows Server 2012 R2
vendor: Microsoft
product: Windows Server 2012 R2 (Server Core installation)
vendor: Microsoft
product: Windows Server 2016
vendor: Microsoft
product: Windows Server 2016 (Server Core installation)
vendor: Microsoft
product: Windows Server 2019
vendor: Microsoft
product: Windows Server 2019 (Server Core installation)
vendor: Microsoft
product: Windows Server 2022
vendor: Microsoft
product: Windows Server 2022, 23H2 Edition (Server Core installation)
vendor: Microsoft
product: Windows Server 2025
vendor: Microsoft
product: Windows Server 2025 (Server Core installation)
CVSS v3.1: version: 3.1
baseSeverity: MEDIUM
baseScore: 6.2
vectorString: CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:58:41.106Z
CVE-2026-40381 Azure Connected Machine Agent Elevation of Privilege Vulnerability
Problem types: cwe_id: CWE-284
description: CWE-284: Improper Access Control
Affected products: vendor: Microsoft
product: Azure Connected Machine Agent
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:31.291Z
CVE-2026-40382 Windows Telephony Service Elevation of Privilege Vulnerability
Problem types: cwe_id: CWE-416
description: CWE-416: Use After Free
Affected products: vendor: Microsoft
product: Windows 10 Version 1607
vendor: Microsoft
product: Windows 10 Version 1809
vendor: Microsoft
product: Windows 10 Version 21H2
vendor: Microsoft
product: Windows 10 Version 22H2
vendor: Microsoft
product: Windows 11 version 23H2
vendor: Microsoft
product: Windows 11 Version 23H2
vendor: Microsoft
product: Windows 11 Version 24H2
vendor: Microsoft
product: Windows 11 Version 25H2
vendor: Microsoft
product: Windows 11 version 26H1
vendor: Microsoft
product: Windows Server 2012
vendor: Microsoft
product: Windows Server 2012 (Server Core installation)
vendor: Microsoft
product: Windows Server 2012 R2
vendor: Microsoft
product: Windows Server 2012 R2 (Server Core installation)
vendor: Microsoft
product: Windows Server 2016
vendor: Microsoft
product: Windows Server 2016 (Server Core installation)
vendor: Microsoft
product: Windows Server 2019
vendor: Microsoft
product: Windows Server 2019 (Server Core installation)
vendor: Microsoft
product: Windows Server 2022
vendor: Microsoft
product: Windows Server 2022, 23H2 Edition (Server Core installation)
vendor: Microsoft
product: Windows Server 2025
vendor: Microsoft
product: Windows Server 2025 (Server Core installation)
CVSS v3.1: version: 3.1
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-05-12T16:59:22.375Z
CVE-2026-40383 Joomla! Core - [20260509] - LFI in HTMLView layout parameter
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
Problem types: cwe_id: CWE-22
description: CWE-22 Improper Limitation of a Pathname to a Restricted Directory
Affected products: vendor: Joomla! Project
product: Joomla! CMS
default_status: unaffected
Credits: lang: en
value: Doyensec in collaboration with Claude and Anthropic Research
Published: 2026-05-26T16:45:14.402Z
CVE-2026-40384 Joomla! Core - [20260510] - Path traversal in com_media webservice endpoint
An improper validation of the search parameter of the com_media files API endpoint leads to a path traversal vulnerability.
Problem types: cwe_id: CWE-22
description: CWE-22 Improper Limitation of a Pathname to a Restricted Directory
Affected products: vendor: Joomla! Project
product: Joomla! CMS
default_status: unaffected
Credits: lang: en
value: Doyensec in collaboration with Claude and Anthropic Research
Published: 2026-05-26T16:45:02.051Z
CVE-2026-40385 
In libexif through 0.6.25, an unsigned 32bit integer overflow in Nikon MakerNote handling could be used by local attackers to cause crashes or information leaks. This only affects 32bit systems.
Problem types: cwe_id: CWE-190
description: CWE-190 Integer Overflow or Wraparound
Affected products: vendor: libexif project
product: libexif
default_status: unknown
CVSS v3.1: attackComplexity: HIGH
attackVector: LOCAL
availabilityImpact: LOW
baseScore: 4
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
version: 3.1
Published: 2026-04-12T18:16:30.420Z
CVE-2026-40386 
In libexif through 0.6.25, an integer underflow in size checking for Fuji and Olympus MakerNote decoding could be used by attackers to crash or leak information out of libexif-using programs.
Problem types: cwe_id: CWE-191
description: CWE-191 Integer Underflow (Wrap or Wraparound)
Affected products: vendor: libexif project
product: libexif
default_status: unknown
CVSS v3.1: attackComplexity: HIGH
attackVector: LOCAL
availabilityImpact: LOW
baseScore: 4
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
version: 3.1
Published: 2026-04-12T18:19:08.684Z
CVE-2026-40393 
In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.
Problem types: cwe_id: CWE-787
description: CWE-787 Out-of-bounds Write
Affected products: vendor: mesa3d
product: Mesa
default_status: unaffected
CVSS v3.1: attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.1
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
version: 3.1
Published: 2026-04-12T18:49:18.984Z
CVE-2026-40394 
Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 allows a "workspace overflow" denial of service (daemon panic) for certain amounts of prefetched data. The setup of an HTTP/2 session starts with a speculative HTTP/1 transport, and upon upgrading to h2 the HTTP/1 request is repurposed as stream zero. During the upgrade, a buffer allocation is made to reserve space to send frames to the client. This allocation would split the original workspace, and depending on the amount of prefetched data, the next fetch could perform a pipelining operation that would run out of workspace.
Problem types: cwe_id: CWE-670
description: CWE-670 Always-Incorrect Control Flow Implementation
Affected products: vendor: varnish-software
product: Varnish Cache
default_status: unaffected
CVSS v3.1: attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 4
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
version: 3.1
Published: 2026-04-12T19:17:34.334Z
CVE-2026-40395 
Varnish Enterprise before 6.0.16r12 allows a "workspace overflow" denial of service (daemon panic) for shared VCL. The headerplus.write_req0() function from vmod_headerplus updates the underlying req0, which is normally the original read-only request from which req is derived (readable and writable from VCL). This is useful in the active VCL, after amending req, to prepare a refined req0 before switching to a different VCL with the return (vcl(<label>)) action. This is for example how the Varnish Controller operates shared VCL deployments. If the amended req contained too many header fields for req0, this would have resulted in a workspace overflow that would in turn trigger a panic and crash the Varnish Enterprise server. This could be used as a Denial of Service attack vector by malicious clients.
Problem types: cwe_id: CWE-770
description: CWE-770 Allocation of Resources Without Limits or Throttling
Affected products: vendor: varnish-software
product: Varnish Enterprise
default_status: unaffected
CVSS v3.1: attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 4
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
version: 3.1
Published: 2026-04-12T19:21:09.265Z
CVE-2026-40396 
Varnish Cache 9 before 9.0.1 allows a "workspace overflow" denial of service (daemon panic) after timeout_linger. A malicious client could send an HTTP/1 request, wait long enough until the session releases its worker thread (timeout_linger) and resume traffic before the session is closed (timeout_idle) sending more than one request at once to trigger a pipelining operation between requests. This vulnerability affecting Varnish Cache 9.0.0 emerged from a port of the Varnish Enterprise non-blocking architecture for HTTP/2. New code was needed to adapt to a more recent workspace API that formalizes the pipelining operation. In addition to the workspace change on the Varnish Cache side, other differences created merge conflicts, like partial support for trailers in Varnish Enterprise. The conflict resolution missed one code path configuring pipelining to perform a complete workspace rollback, losing the guarantee that prefetched data would fit inside workspace_client during the transition from one request to the next. This can result in a workspace overflow, triggering a panic and crashing the Varnish server.
Problem types: cwe_id: CWE-670
description: CWE-670 Always-Incorrect Control Flow Implementation
Affected products: vendor: varnish-software
product: Varnish Cache
default_status: unaffected
CVSS v3.1: attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 4
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
version: 3.1
Published: 2026-04-12T19:23:03.408Z