CVE-2026-26247

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CVSS 3.1

9.1 critical

EPSS

<1%p41

Published

Jul 3, 2026 (Jul 3, 2026)

Modified

Jul 7, 2026

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: CWE-284
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (0.5%)

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