Inclusion of Functionality from Untrusted Control Sphere in Gitea - CVE-2026-73800
Published: August 15, 2026
Vulnerability identifier: #VU142694
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-73800
CWE-ID: CWE-829
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute attacker-controlled workflow code and disclose sensitive information.
The vulnerability exists due to inclusion of functionality from an untrusted control sphere in local reusable workflow resolution when processing pull_request_target events that call local reusable workflows. A remote user can open a pull request from a fork containing a crafted reusable workflow to execute attacker-controlled workflow code and disclose sensitive information.
Only instances with Gitea Actions enabled and a pull_request_target workflow that calls a local reusable workflow via ./ or the $/ same-repo form are vulnerable.
Affected software
Gitea
How to mitigate CVE-2026-73800
Install security update from vendor's website.
Gitea - update to 1.27.2