Backend.AI Missing Authorization vulnerability
Date: 2025-06
Affected: pip/backend.ai
Attack vector: auth-bypass
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2025-49651
CVE-2025-49652
CVE-2025-49653
CWE: CWE-200
CWE-306
CWE-862
CVSS: 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Missing Authorization in Lablup's BackendAI allows attackers to takeover all active sessions; Accessing, stealing, or altering any data accessible in the session. This vulnerability exists in all current versions of BackendAI. NOTE: The maintainers of BackendAI do not consider this report to fit with their threat model and advise users to follow security advice from https://github.com/lablup/backend.ai/pull/7587 in their instances to protect themselves from the conditions that would lead to the situation described in the CVE record.


Mitigations:

Architectural layers (MAESTRO):