GitLab: Mehrere Schwachstellen
WID-SEC-2026-0292 · first 07.12.2021 · updated 04.02.2026 · CVSS 9,4
What it is about
GitLab ist eine Webanwendung zur Versionsverwaltung für Softwareprojekte auf Basis von git. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in GitLab ausnutzen, um seine Privilegien zu erhöhen, Informationen offenzulegen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service zu verursachen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- seine Privilegien zu erhöhen
- Informationen offenzulegen
- Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service zu verursachen
Am I affected?
Affected according to the BSI:
- Open Source Arch Linux
- Open Source GitLab <14.5.2
- Open Source GitLab <14.4.4
- Open Source GitLab <14.3.6
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source GitLab 14.5.2
- Open Source GitLab 14.4.4
- Open Source GitLab 14.3.6
Is the vulnerability already being exploited?
- CVE-2021-39935: exploited in the wild according to CISA, in the catalogue since 03.02.2026.
Information and sources
- Original BSI advisory (WID)
- GitLab Security Release: 14.5.2, 14.4.4, and 14.3.6 vom 2021-12-06 about.gitlab.com
- Arch Linux Security Advisory ASA-202112-10 vom 2021-12-11 security.archlinux.org
- CISA Known Exploited Vulnerabilities Catalog vom 2026-02-03 www.cisa.gov
CVE: CVE-2021-39910, CVE-2021-39915, CVE-2021-39916, CVE-2021-39917, CVE-2021-39918, CVE-2021-39919, CVE-2021-39930, CVE-2021-39931, CVE-2021-39932, CVE-2021-39933, CVE-2021-39934, CVE-2021-39935, CVE-2021-39936, CVE-2021-39937, CVE-2021-39938, CVE-2021-39940, CVE-2021-39941, CVE-2021-39944, CVE-2021-39945
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.