Gitea OAuth2 PKCE S256 verifier bypass

심각 9.1CVE-2026-26247 · GHSA-m5ch-ppfx-xv3v · GO-2026-6342 · Published 03/07/2026 · updated 25/10/2026

요약

CVE-2026-26247은(는) code.gitea.io/gitea에 영향을 주는 심각 (CVSS 9.1) 취약점입니다.
향후 30일 내 악용 확률(EPSS): 0.50%, 전체 취약점의 42.5%보다 높음.
조치: 1.25.5 이상으로 업데이트하세요.

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

Description

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.

NVD description

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.

References

nvd.nist.gov/vuln/detail/CVE-2026-26247 · ADVISORY
go-gitea/gitea#36462 · WEB
go-gitea/gitea#36477 · WEB
go-gitea/gitea commit 750649c · WEB
go-gitea/gitea commit bf8d11b · 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-m5ch-ppfx-xv3v · 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 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.

NVD description

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.

code.gitea.io/gitea의 다른 취약점

모두 보기 →