Incorrect authorization in Gitea - CVE-2026-66853
Published: August 31, 2026
Vulnerability identifier: #VU146352
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66853
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information about limited-visibility organizations.
The vulnerability exists due to improper access control in the user organization list API endpoint when listing the public organization memberships of a known user. A remote user can send a request to the `GET /api/v1/users/{username}/orgs` endpoint to disclose sensitive information about limited-visibility organizations.
A restricted account can enumerate organization names, descriptions, and avatar metadata through this list endpoint, while the single-organization endpoint returns `404` for the same organizations.
Affected software
Gitea
How to mitigate CVE-2026-66853
Install security update from vendor's website.
Gitea - update to 1.27.3