CVE-2026-17556
A remote, anonymous attacker can exploit a vulnerability in Microsoft GitHub Enterprise to manipulate files.
CSIRTS triage
- What
- A vulnerability allows remote anonymous attackers to manipulate files on GitHub Enterprise systems.
- Who is affected
- All deployments of Microsoft GitHub Enterprise are potentially affected.
- Urgency
- High severity; exploitation path is not yet documented but the attack surface is unauthenticated.
- Action
- Apply the security patch from Microsoft as soon as it becomes available; monitor GitHub Enterprise security advisories.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
Advisory coverage (2)
- high[NEW] [high] Microsoft GitHub Enterprise: Vulnerability enables file manipulationcert-bund · 2026-08-06
- unknownCVE-2026-17556: A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an unau…nvd · 2026-08-05
External references
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[](https://www.csirts.com/cve/CVE-2026-17556)