Gitea forwarded-proto validation allows canonical URL spoofing

HIGH 7.5CVE-2026-27779 · GHSA-v8f2-2ghq-9whv · GO-2026-6345 · Published 03/07/2026 · updated 25/10/2026

In short

CVE-2026-27779 is a HIGH (CVSS 7.5) vulnerability affecting code.gitea.io/gitea.
Chance of exploitation in the next 30 days (EPSS): 0.58%, higher than 47.8% of all vulnerabilities.
Fix: update to 1.25.5 or later.

Package	Affected versions	Patched versions
code.gitea.io/gitea Go	`< 1.25.5`	`1.25.5`

Description

Gitea versions before 1.25.5 accept malformed or injected forwarded-proto values when detecting public URLs, allowing spoofed canonical URL generation.

NVD description

Gitea versions before 1.25.5 accept malformed or injected forwarded-proto values when detecting public URLs, allowing spoofed canonical URL generation.

References

nvd.nist.gov/vuln/detail/CVE-2026-27779 · ADVISORY
go-gitea/gitea#36810 · WEB
go-gitea/gitea#36836 · WEB
go-gitea/gitea commit 723ce35 · WEB
go-gitea/gitea commit e2517e0 · WEB
blog.gitea.com/release-of-1.25.5 · WEB
go-gitea/gitea · PACKAGE
go-gitea/gitea release v1.25.5 · WEB
blog.gitea.com/release-of-1.25.5
GitHub Advisory GHSA-v8f2-2ghq-9whv · ADVISORY

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Package

Affected versions

Patched versions

code.gitea.io/gitea

< 1.25.5

1.25.5

Description

Gitea versions before 1.25.5 accept malformed or injected forwarded-proto values when detecting public URLs, allowing spoofed canonical URL generation.

NVD description

Gitea versions before 1.25.5 accept malformed or injected forwarded-proto values when detecting public URLs, allowing spoofed canonical URL generation.

More vulnerabilities in code.gitea.io/gitea

See all →