Improper Authentication in Gitea - CVE-2026-101023
Published: October 19, 2026
Vulnerability identifier: #VU156112
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-101023
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to extend access beyond a captured OAuth access token's original lifetime.
The vulnerability exists due to missing token-kind validation in Gitea's OAuth refresh-token endpoint when processing token refresh requests. A remote user can submit an unexpired access token for the same client and grant as a refresh token to obtain new access and refresh tokens, extending access beyond the original token's lifetime.
Affected software
Gitea
How to mitigate CVE-2026-101023
Install security update from vendor's website.
Gitea - update to 28.1.0