CVE-2026-0573

Vulnerability Description

An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• https://docs.github.com/en/[email protected]/admin/release-notes#3.14.22ProductRelease Notes
• https://docs.github.com/en/[email protected]/admin/release-notes#3.15.17ProductRelease Notes
• https://docs.github.com/en/[email protected]/admin/release-notes#3.16.13ProductRelease Notes
• https://docs.github.com/en/[email protected]/admin/release-notes#3.17.10ProductRelease Notes
• https://docs.github.com/en/[email protected]/admin/release-notes#3.18.4ProductRelease Notes
• https://docs.github.com/en/[email protected]/admin/release-notes#3.19.2ProductRelease Notes