CVE-2026-26247
Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange
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.
INFO
Published Date :
July 3, 2026, 8:19 p.m.
Last Modified :
July 3, 2026, 8:19 p.m.
Remotely Exploit :
No
Source :
Gitea
Affected Products
The following products are affected by CVE-2026-26247
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Gitea to version 1.25.5 or later.
- Verify OAuth2 PKCE challenge method persistence.
- Review access token security configurations.
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The following list is the news that have been mention
CVE-2026-26247 vulnerability anywhere in the article.