CVE-2026-0573 (GCVE-0-2026-0573)
Vulnerability from cvelistv5 – Published: 2026-02-18 20:37 – Updated: 2026-02-18 21:20
VLAI
EPSS
VEX
Title
Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-18 21:18 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
GitHub_P
CNA
References
6 references
| URL | Tags |
|---|---|
| https://docs.github.com/en/enterprise-server@3.14… | release-notes |
| https://docs.github.com/en/enterprise-server@3.15… | release-notes |
| https://docs.github.com/en/enterprise-server@3.16… | release-notes |
| https://docs.github.com/en/enterprise-server@3.17… | release-notes |
| https://docs.github.com/en/enterprise-server@3.18… | release-notes |
| https://docs.github.com/en/enterprise-server@3.19… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitHub | Enterprise Server |
Affected:
3.14 , ≤ 3.14.21
(semver)
Affected: 3.15 , ≤ 3.15.16 (semver) Affected: 3.16 , ≤ 3.16.12 (semver) Affected: 3.17 , ≤ 3.17.9 (semver) Affected: 3.18 , ≤ 3.18.3 (semver) Affected: 3.19 , ≤ 3.19.1 (semver) |
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