CVE-2026-20896
Gitea Docker image trusts spoofable reverse-proxy headers by default
CRITICAL 9.8
At a glance
- Source
- NVD
- EPSS
- EPSS 2.76 % · percentile 86 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Gitea
- NVD status
- Deferred
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.
Weaknesses (CWE)
- CWE-284 — Improper Access Control
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Gitea |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 88ee5874-cf24-4952-aea0-31affedb7ff2 (Secondary) |
Advisories
- GHSA-f75j-4cw6-rmx4 — Gitea Docker image: `REVERSE_PROXY_TRUSTED_PROXIES = *` default lets any source IP impersonate any user via `X-WEBAUTH-USER`
- GO-2026-6051 — Gitea Docker image: `REVERSE_PROXY_TRUSTED_PROXIES = *` default lets any source IP impersonate any user via `X-WEBAUTH-USER` in code.gitea.io/gitea
European references
- ENISA EUVD · EUVD-2026-41614
- GCVE · GCVE-0-2026-20896
Affected products
| Product | Versions |
|---|---|
| Gitea · Gitea Open Source Git Server | affected 0 ≤ 1.26.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |