PHP
CVE-2026-27968
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
3DescriptionGitHub Advisory
Packistry is a self-hosted Composer repository designed to handle PHP package distribution. Prior to version 0.13.0, RepositoryAwareController::authorize() verified token presence and ability, but did not enforce token expiration. As a result, an expired deploy token with the correct ability could still access repository endpoints (e.g., Composer metadata/download APIs). The fix in version 0.13.0 adds an explicit expiration check, and tests now test expired deploy tokens to ensure they are rejected.
AnalysisAI
Packistry versions prior to 0.13.0 fail to validate token expiration in the RepositoryAwareController::authorize() function, allowing attackers with expired deploy tokens to maintain unauthorized access to repository endpoints and package metadata. An authenticated attacker can leverage an expired token with valid abilities to interact with Composer APIs and potentially download or access sensitive package information. This vulnerability affects self-hosted Packistry deployments and has been patched in version 0.13.0.
Technical ContextAI
Classified as CWE-287 (Improper Authentication). Affects Packistry. Packistry is a self-hosted Composer repository designed to handle PHP package distribution. Prior to version 0.13.0, RepositoryAwareController::authorize() verified token presence and ability, but did not enforce token expiration. As a result, an expired deploy token with the correct ability could still access repository endpoints (e.g., Composer metadata/download APIs). The fix in version 0.13.0 adds an explicit expiration check, and tests now test expired deploy tokens to ensure they are rejec
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
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Same weakness CWE-287 – Improper Authentication
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External POC / Exploit Code
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