CVE-2026-77987

A server-side request forgery SSRF vulnerability was identified in the notebook viewer of GitHub Enterprise Server. The notebook viewer validated the scheme and host of a user-supplied URL but did not validate the port, allowing requests to be directed to internal services listening on other port...

CVE-2026-77987 GitHub Enterprise Server notebook viewer vulnerable to Server-side request forgery

A server-side request forgery SSRF vulnerability was identified in the notebook viewer of GitHub Enterprise Server. The notebook viewer validated the scheme and host of a user-supplied URL but did not validate the port, allowing requests to be directed to internal services listening on other port...

CVE-2026-77987

A server-side request forgery (SSRF) vulnerability exists in the notebook viewer of GitHub Enterprise Server (versions 3.17 through 3.22). The root cause is the failure to validate the port of user-supplied URLs, despite validating the scheme and host. This allows requests to internal services on...

PT-2026-97052

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions 3.17 through 3.22 Description A server-side request forgery SSRF issue exists in the notebook viewer. While the system validates the scheme and host of a user-supplied URL, it fails to validate the port. This...