CVE-2026-20896

critical · 9.8

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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.

9.8

CVSS

2.8%

EPSS (exploit prob.)

86th

EPSS percentile

2026-07-03

Published

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

Weaknesses

CWE-284

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-20896