CVE-2026-20896

Gitea Docker image trusts spoofable reverse-proxy headers by default

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 2.76 % · percentile 86 (2026-10-28)
State: PUBLISHED
Published: 2026-07-03
Updated: 2026-07-07
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.

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)

Weaknesses (CWE)

CWE-284

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

References

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