What is GHSA-m5ch-ppfx-xv3v?

GHSA-m5ch-ppfx-xv3v is a security advisory published by GitHub Security Advisories with unknown severity. Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly...

Which CVE IDs does GHSA-m5ch-ppfx-xv3v cover?

GHSA-m5ch-ppfx-xv3v covers the following CVE IDs: CVE-2026-26247. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

GHSA-m5ch-ppfx-xv3vunknown

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly...

Vendor

GitHub Security Advisories

Published

July 3, 2026

Last Modified

July 3, 2026

🔗 CVE IDs covered (1)

CVE-2026-26247 →

📋 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 (6)

https://nvd.nist.gov/vuln/detail/CVE-2026-26247
https://github.com/go-gitea/gitea/pull/36462
https://github.com/go-gitea/gitea/pull/36477
https://blog.gitea.com/release-of-1.25.5
https://github.com/go-gitea/gitea/releases/tag/v1.25.5
https://github.com/advisories/GHSA-m5ch-ppfx-xv3v