Release notes - GitHub Enterprise Server 3.21 Docs

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Publisherdocs.github.com

Article IDNo stable ID in source URL

Verified snapshot27 Sept 2026, 02:00 UTC

Linked CVEs6

Linked CVE reports

These are source relationships, not a claim that this article fixes every affected product or branch.

CVE-2026-19118Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution
CVE-2026-76851Server-Side Request Forgery vulnerability in GitHub Enterprise Server allowed remote code execution via network access from pre-receive hooks to internal services
CVE-2026-17556Path traversal in GitHub Enterprise Server allowed unauthenticated deletion of instance storage via the X-GitHub-Request-Id header
CVE-2026-14340An incorrect authorization vulnerability in GitHub Enterprise Server allows issue creation in unrelated public repositories
CVE-2026-9106UI misrepresentation vulnerability in GitHub Enterprise Server allowed unauthorized organization runner management via undisclosed OAuth scope on consent screen
CVE-2026-8606Server-Side Request Forgery in GitHub Enterprise Server via Advisory Package URL Endpoint

Source and provenance

Original title: Release notes - GitHub Enterprise Server 3.21 Docs. Captured 27 Sept 2026, 02:00 UTC. The stored article is used for enrichment and change detection; BlackTree does not republish the publisher's full text here.

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