Microsoft GitHub Enterprise Server: Mehrere Schwachstellen
WID-SEC-2026-2418 · first 20.07.2026 · updated 20.07.2026 · CVSS 8,1
What it is about
GitHub ist ein netzbasierter Dienst zur Versionsverwaltung für Software-Entwicklungsprojekte. Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Microsoft GitHub Enterprise Server ausnutzen, um einen Denial of Service Angriff durchzuführen, Daten zu manipulieren, Code auszuführen und Informationen offenzulegen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
- Daten zu manipulieren
- Code auszuführen
- Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Microsoft GitHub Enterprise Server <3.17.18
- Microsoft GitHub Enterprise Server <3.18.12
- Microsoft GitHub Enterprise Server <3.19.9
- Microsoft GitHub Enterprise Server <3.20.5
- Microsoft GitHub Enterprise Server <3.21.3
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Microsoft GitHub Enterprise Server 3.17.18
- Microsoft GitHub Enterprise Server 3.18.12
- Microsoft GitHub Enterprise Server 3.19.9
- Microsoft GitHub Enterprise Server 3.20.5
- Microsoft GitHub Enterprise Server 3.21.3
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- GitHub Advisory Database vom 2026-07-19 github.com
- GitHub Advisory Database vom 2026-07-19 github.com
- GitHub Advisory Database vom 2026-07-19 github.com
- GitHub Release Notes vom 2026-07-19 docs.github.com
- GitHub Release Notes vom 2026-07-19 docs.github.com
- GitHub Release Notes vom 2026-07-19 docs.github.com
- GitHub Release Notes vom 2026-07-19 docs.github.com
- GitHub Release Notes vom 2026-07-19 docs.github.com
CVE: CVE-2026-15007, CVE-2026-15343, CVE-2026-15783
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.