Threats Tagged 'cve-2026-77987'
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Threats Tagged 'cve-2026-77987'
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0 CVE-2026-77987 is a critical server-side request forgery (SSRF) vulnerability in the notebook viewer component of GitHub Enterprise Server. The vulnerability arises because the notebook viewer validates the scheme and host of user-supplied URLs but fails to validate the port, allowing requests to internal services on different ports. Although response bodies are not returned, response timing can be used to extract instance secrets character by character. These secrets can then be leveraged to achieve remote code execution on the appliance. The vulnerability affects GitHub Enterprise Server versions 3.17 through 3.22 and requires network access to the instance. Exploitation is unauthenticated if private mode is disabled, or requires any authenticated user if private mode is enabled. Fixed versions include 3.22.1, 3.21.6, 3.20.8, 3.19.12, 3.18.15, and 3.17.21. Join the discussion | CVE Database V5 | 09/22/2026, 20:43:53 UTC Added: 09/22/2026, 20:48:28 UTC |
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