python-scrapy: brotli: Python brotli decompression bomb DoS
CVE: CVE-2025-6176
Component: Scrapy
CWE: CWE-400
Severity: Important
CVSS v3: 7.5/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Release date: 2025-10-31T00:00:21.219000+00:00

Scrapy are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression.

Statement: This vulnerability is rated Important for Red Hat products. The flaw in Scrapy's brotli decompression implementation allows remote attackers to trigger a denial of service by sending specially crafted brotli-compressed data. This can lead to excessive memory consumption and system instability.

Remediation:
For OpenShift Container Platform 4.12 see the following documentation,
which will be updated shortly for this release, for important instructions
on how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes

You may download the oc tool and use it to inspect release image metadata
for x86_64 architecture. The image digest may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha value for the release is as follows:

      (For x86_64 architecture)
      The image digest is podman pull quay.io/openshift-release-dev/ocp-release@sha256:07275faf221c556cca2a816cb48a87bdc25a44ff41f91bb88a232c15bc09165e

All OpenShift Container Platform 4.12 users are advised to upgrade to these
updated packages and images when they are available in the appropriate
release channel. To check for available updates, use the OpenShift CLI (oc)
or web console. Instructions for upgrading a cluster are available at
https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor.
For OpenShift Container Platform 4.13 see the following documentation,
which will be updated shortly for this release, for important instructions
on how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.13/html/release_notes

You may download the oc tool and use it to inspect release image metadata
for x86_64 architecture. The image digest may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha value for the release is as follows:

      (For x86_64 architecture)
      The image digest is sha256:a7c362225f22ef51feca9c9959409ffc5f8308a9ecc06ed2cc39b31668327eba

All OpenShift Container Platform 4.13 users are advised to upgrade to these
updated packages and images when they are available in the appropriate
release channel. To check for available updates, use the OpenShift CLI (oc)
or web console. Instructions for upgrading a cluster are available at
https://docs.redhat.com/en/documentation/openshift_container_platform/4.13/html-single/updating_clusters/index#updating-cluster-within-minor.
For OpenShift Container Platform 4.14 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.14/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:5d84e0f03cadea0cffa8a36ea86f815c4015d18af9e7150dbc4ce7c3b4043891

      (For s390x architecture)
      The image digest is sha256:8482c7b8dda889961377707d79813d14f4283c8bfb93b33767b62f9c08684f82

      (For ppc64le architecture)
      The image digest is sha256:731eefeadb4821a0e9e4572039b85467035d0388bd003b8484324ac7c5917caf

      (For aarch64 architecture)
      The image digest is sha256:e116421add29af6e166cbc15891dba184ddc560c5976b424532f96bf0472c2e9

All OpenShift Container Platform 4.14 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.14/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.15 see the following documentation,
which will be updated shortly for this release, for important instructions
on how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.15/html/release_notes/

You may download the oc tool and use it to inspect release image metadata
for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests
may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:0301752d0cbc1d62336f5c467be4b63947e882750760243f513da5c6c003289e

      (For s390x architecture)
      The image digest is sha256:92ae7546248ac2341469a7bd801569e225bfab6177fae12a1aa90c990e96459b

      (For ppc64le architecture)
      The image digest is sha256:ba40e267f4ff9a6150513e3b2411032cbedbe4ffc0bed012f17675e5a40d473e

      (For aarch64 architecture)
      The image digest is sha256:a780ba0cb96fe8e52708f989caf17a7aebc38142cc43aec45d063e5520190761

All OpenShift Container Platform 4.15 users are advised to upgrade to these
updated packages and images when they are available in the appropriate
release channel. To check for available updates, use the OpenShift CLI (oc)
or web console. Instructions for upgrading a cluster are available at
https://docs.redhat.com/en/documentation/openshift_container_platform/4.15/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.16 see the following documentation,
which will be updated shortly for this release, for important instructions
on how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/release_notes/

You may download the oc tool and use it to inspect release image metadata
for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests
may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:c9e3973d54f71b4ff23c397b645a51cd47c010d103e921630bda5028d04ff3d8

      (For s390x architecture)
      The image digest is sha256:1aa9016d22c8d1583a551c6781e08edebf28fab83fa9260a2004bcb0632dc6bf

      (For ppc64le architecture)
      The image digest is sha256:ac6b3774ae09bc158fe6cecf4da0eb365197a61d3bf51ee1adfbe91ded39f3ea

      (For aarch64 architecture)
      The image digest is sha256:eead1994f8221d432dffa6441cc42390a6c7dafe4d1e38cb85c6c14d50f91317

All OpenShift Container Platform 4.16 users are advised to upgrade to these
updated packages and images when they are available in the appropriate
release channel. To check for available updates, use the OpenShift CLI (oc)
or web console. Instructions for upgrading a cluster are available at
https://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.17 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:fffcbd70f5251c30d23bdcc87900e3eaf8b3ae4945a29618c26277669b453b1d

      (For s390x architecture)
      The image digest is sha256:431a84a0699f3bd4432874d393a87330d962b8b908eaebffc0238f50c66ea05d

      (For ppc64le architecture)
      The image digest is sha256:fb50fb7774e135be5db3ae5c3c4333d266f7a7902fb36a1473266de85e0f5738

      (For aarch64 architecture)
      The image digest is sha256:254290f2ca3f3ee45d29d96f9dc60e7b1c2eda513cf4554a559d59c084368d82

All OpenShift Container Platform 4.17 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:14bd3c04daa885009785d48f4973e2890751a7ec116cc14d17627245cda54d7b

      (For s390x architecture)
      The image digest is sha256:8fa62a2f2fe6cf7b21c97b5db889e1320f40924e84be8273b05cb995af18a33a

      (For ppc64le architecture)
      The image digest is sha256:64963e6db3fbf634000d05f88d6fcd4a8e2d4a30caa2ce645b976e2bfadf8c1f

      (For aarch64 architecture)
      The image digest is sha256:bc4dd607807cf7b1c218b2f81a053e1d13a14ef89c24ef092df455d87deca46c

All OpenShift Container Platform 4.18 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.19 see the following documentation,
which will be updated shortly for this release, for important instructions
on how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/

You may download the oc tool and use it to inspect release image metadata
for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests
may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:02dc35500ba334f341cccbd671471d0941417d135c958a357fb17de61c3ec743

      (For s390x architecture)
      The image digest is sha256:4ae8f04dfa49dd7e080ad2a957d02248e12ad8a451bc8751e6578fedf883bf3b

      (For ppc64le architecture)
      The image digest is sha256:8b97a397a2d61a7b45ab2e08f5a125e35a310ba6a61693085e927da3b8fb5d12

      (For aarch64 architecture)
      The image digest is sha256:8e823cdd23c13511d26c45aef2eab267c85878b7ea1f85e8d0dcbbee77262dac

All OpenShift Container Platform 4.19 users are advised to upgrade to these
updated packages and images when they are available in the appropriate
release channel. To check for available updates, use the OpenShift CLI (oc)
or web console. Instructions for upgrading a cluster are available at
https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.
The container images provided by this update can be downloaded from the
Red Hat container registry at registry.redhat.io using the "podman pull" command.
The container images provided by this update can be downloaded from the
Red Hat container registry at registry.redhat.io using the "podman pull" command.
The container images provided by this update can be downloaded from the
Red Hat container registry at registry.redhat.io using the "podman pull" command.
Before applying this update, make sure all previously released errata relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.