Auth bypass in Gitea Open Source Git Server
CVE-2026-57886
Cross-repository issue/comment attachment re-linking can expose private attachment content
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001
Affected products
- Gitea Open Source Git Server — versions 0
Weakness classification (CWE)
References
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (vendor-advisory)
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
- 88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
Frequently asked questions
- What is CVE-2026-57886?
- CVE-2026-57886 is a medium-severity vulnerability in Gitea Open Source Git Server, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.9/10. Published 2026-08-13.
- How severe is CVE-2026-57886?
- Medium severity. CVSS v3 base score is 5.9 out of 10.