CVE-2026-63792: Gitea private reusable workflow disclosure to fork runs

Vulnerability summary

CVE-2026-63792 is a medium (CVSS 5.3) vulnerability in gitea. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36.7% of scored vulnerabilities.

Timeline

1. 14-10-2026
   PublishedVulnerability first disclosed.
2. 14-10-2026
   Last modifiedVulnerability information updated.

Description

Gitea's collaborative-owner authorization path for reading cross-repository reusable workflows does not exclude fork pull request runs. An approved fork workflow targeting a private repository can read workflow files from another private repository that trusts the base repository's owner through collaborative-owner configuration. The issue exposes private reusable workflow contents at caller-selected Git refs; it does not itself grant write access or code execution in the other repository.

• CWE-280Improper Handling of Insufficient Permissions or PrivilegesThe product does not handle or incorrectly handles when it has insufficient privileges to access resources or functionality as specified by their permissions. This may cause it to follow unexpected code paths that may leave the product in an invalid state.