Gitea Docker image trusts spoofable reverse-proxy headers by default

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-20896
StatePUBLISHED
AssignerGitea
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-03 21:16:56 UTC
Updated2026-07-07 18:16:35 UTC
DescriptionGitea 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 88ee5874-cf24-4952-aea0-31affedb7ff2

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

EPSS: 0.007830000 probability, percentile 0.516830000 (date 2026-07-09)

Problem Types: CWE-284 | CWE-284 CWE-284

VersionSourceTypeScoreSeverityVector
3.188ee5874-cf24-4952-aea0-31affedb7ff2Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gitea Gitea Open Source Git Server affected 1.26.2 semver Not specified

References

ReferenceSourceLinkTags
blog.gitea.com/release-of-1.26.3-and-1.26.4 88ee5874-cf24-4952-aea0-31affedb7ff2 blog.gitea.com
github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/go-gitea/gitea/pull/38151 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/releases/tag/v1.26.3 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Joshua Martinelle (Tenable) (en)

CNA: rz1027 (en)

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