VULNERABILITY INTELLIGENCE
CVE-2026-26247
CVSS score9.1 CRITICAL
EPSS probability0.50%
CISA KEVNot currently listed
Published2026-07-03
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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.
Weakness classification
- CWE-284: Improper Access Control