CVE-2026-20896

CRITICAL 9.8

Gitea Docker image trusts spoofable reverse-proxy headers by default

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-284
Vendor	gitea
Product	gitea open source git server
Published	Jul 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Gitea / Gitea Open Source Git Server

0 ≤ 1.26.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4 github.com: https://github.com/go-gitea/gitea/pull/38151 github.com: https://github.com/go-gitea/gitea/releases/tag/v1.26.3 blog.gitea.com: https://blog.gitea.com/release-of-1.26.3-and-1.26.4/

Credits

🔍 rz1027