PT-2026-55597
CVE-2026-26247
·
Published
2026-07-03
·
Updated
2026-10-25
Description by
CVSS 3.1
9.1
CriticalMetricsAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Name of the Vulnerable Software and Affected Versions
Gitea versions prior to 1.25.5
Description
The software fails to correctly persist the OAuth2 PKCE S256 challenge method during the authorization process. This flaw allows for token exchange without the required verifier check. PKCE (Proof Key for Code Exchange) is a security extension for OAuth2 designed to prevent authorization code injection attacks.
Recommendations
Update Gitea to version 1.25.5 or later.
Exploitability
Exploit
Fix
Impacts
Researchers
Vendors
Affected products
Found an issue in the description? Have something to add? Feel free to write us 👾