Gitea versions 1.26.2 and earlier are susceptible to authorization bypass and insecure direct object reference (IDOR) vulnerabilities, posing a significant risk to source code integrity and confidentiality.

This vulnerability involves CWE-639 (Authorization Bypass Through User-Controlled Key) and CWE-863 (Incorrect Authorization). It permits an authenticated user to manipulate object references to access or modify resources they are not authorized to interact with.

The exploitation of this flaw could lead to unauthorized access to sensitive repositories, intellectual property theft, or unauthorized modification of project data. With a CVSS score of 7.1, this is classified as a High severity issue, as it directly undermines the access control mechanisms designed to protect critical development environments.

Immediate Action: Upgrade all Gitea instances to version 1.26.3 or later immediately to apply the necessary authorization patches.

Proactive Monitoring: Review repository access logs for anomalous patterns, specifically looking for users attempting to access repositories or objects outside their assigned scope.

Compensating Controls: Implement strict network access controls and ensure that the Gitea instance is not exposed to the public internet without a robust, authenticated proxy layer.

Public Exploit Available: false

Given the potential for unauthorized access to core development infrastructure, organizations should prioritize patching this vulnerability immediately. Administrators must transition to version 1.26.3 or newer to remediate the authorization logic flaws and ensure that repository-level permissions are correctly enforced.