# CVE-2026-0573: Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution

> CVE-2026-0573: Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution. CVSS 9.0 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-0573
Last updated: 2026-06-17T10:10:58Z

- Published: 2026-02-18 20:37 UTC · Updated: 2026-06-17 10:10 UTC · Assigner: GitHub\_P
- CVSS: 9.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- EPSS: 0.74%, 54th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-601

## 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.

## Affected vendors and products

- GitHub: Enterprise Server

## Tracked companies

- [GitHub](https://rewindex.com/company/github.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-0573)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-0573)
- [https://docs.github.com/en/enterprise-server@3.14/admin/release-notes\#3.14.22](https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.22)
- [https://docs.github.com/en/enterprise-server@3.15/admin/release-notes\#3.15.17](https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.17)
- [https://docs.github.com/en/enterprise-server@3.16/admin/release-notes\#3.16.13](https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.13)
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes\#3.17.10](https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.10)
- [https://docs.github.com/en/enterprise-server@3.18/admin/release-notes\#3.18.4](https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.4)
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes\#3.19.2](https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.2)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-0573 · Markdown: https://rewindex.com/cve/CVE-2026-0573.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-0573 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:35.307Z