VulnerabilityDeferred

CVE-2026-20896

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.

CRITICAL 9.8EPSS 2.76%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 2.76% probability · 85th percentile
CISA KEV: Not listed
Weakness: CWE-284
Source: 88ee5874-cf24-4952-aea0-31affedb7ff2

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.