CVE-2026-20896
9.8
CRITICAL · CVSS 3.1 · EPSS 2.8% (pctl 86)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
Gitea Docker image versions up to and including 1.26.2 use REVERSE_PROXY_TRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 2.76% — more likely to be exploited than 86% of all CVEs |
| Weakness | CWE-284 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2026-07-03 |
| Last modified | 2026-07-07 |
References
- https://blog.gitea.com/release-of-1.26.3-and-1.26.4/
- https://github.com/go-gitea/gitea/pull/38151
- https://github.com/go-gitea/gitea/releases/tag/v1.26.3
- https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4
- https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4
→ the Explorer · watch your stack · NVD