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[NEW] [high] Microsoft GitHub Enterprise Server: Multiple vulnerabilities

highCVE-2026-18730CVE-2026-19118CVE-2026-76851
A remote, anonymous attacker can exploit multiple vulnerabilities in Microsoft GitHub Enterprise Server to disclose information or execute arbitrary code.

CSIRTS triage

vendor: Microsoftproduct: GitHub Enterprise ServerInformation disclosureRemote code execution
What
Multiple vulnerabilities enable information disclosure and remote code execution.
Who is affected
Instances of GitHub Enterprise Server connected to networks or exposed to the internet.
Urgency
High; remote code execution is possible without authentication.
Action
Update GitHub Enterprise Server to the patched version provided by Microsoft immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
high
Published
2026-09-02
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3151

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-18730coverage & exploitation statusNVD · CVE.org
CVE-2026-19118coverage & exploitation statusNVD · CVE.org
CVE-2026-76851coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Microsoft GitHub Enterprise Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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