Auth bypass in Gitea Open Source Git Server
CVE-2026-27775
Gitea 1.25.5 caches a branch-specific write-permission result across multiple refs in one pre-receive hook session, allowing a per-branch maintainer-edit grant to be reused for other refs and escalate to full repository write access.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Gitea Open Source Git Server — versions 1.25.5
Weakness classification (CWE)
References
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (vendor-advisory)
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (patch)
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
Frequently asked questions
- What is CVE-2026-27775?
- CVE-2026-27775 is a high-severity vulnerability in Gitea Open Source Git Server, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-07-03.
- How severe is CVE-2026-27775?
- High severity. CVSS v3 base score is 8.8 out of 10.