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...

CVE-2026-77912

A stored cross-site scripting (XSS) vulnerability exists in GitHub Enterprise Server within the Markdown rendering pipeline . The flaw occurs because the pipeline rewrote quote characters in already-sanitized HTML without performing subsequent re-sanitization, allowing an authenticated attacker t...