Auth bypass in Packistry
CVE-2026-27968
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Packistry — versions < 0.13.0
- Packistryphp Packistry
Weakness classification (CWE)
References
- github.com/packistry/packistry/security/advisories/GHSA-4r9m-jp53-vgmw (Patch, Vendor Advisory)
- github.com/packistry/packistry/pull/276 (Patch, Issue Tracking)
- github.com/packistry/packistry/commit/7740b48f0f4ecbe63099fb056c8a146180f8b283 (Patch)
Frequently asked questions
- What is CVE-2026-27968?
- CVE-2026-27968 is a medium-severity vulnerability in Packistry, classified under Improper Authentication. CVSS score: 4.3/10. Published 2026-02-26.
- How severe is CVE-2026-27968?
- Medium severity. CVSS v3 base score is 4.3 out of 10.