CVE-2026-20896
CRITICAL
CVSS: 9.8
EPSS: 2.8%
VulnCheck KEV
PoC Available
CWE-284
T1078
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.
Published: 2026-07-03