High severity7.5NVD Advisory· Published Oct 22, 2026
CVE-2026-112212
CVE-2026-112212
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have poisoned a shared cache's OAuth/OIDC discovery document to redirect certain flows to an externally controlled server, due to improper trust of user-supplied values when constructing endpoint URLs in cached discovery responses.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Range: from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1
- Range: from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1
Patches
Vulnerability mechanics
References
1News mentions
3- 12-Year-Old GitLab Vulnerability Allows Remote Code Execution on Self-Managed ServerCyber Security News · Oct 22, 2026
- Critical GitLab Flaw (CVSS 10.0) Could Allow Unauthenticated RCE Across 12 Years of ReleasesThe Hacker News · Oct 21, 2026
- GitLab Critical Patch Release: 19.5.1, 19.4.3, 19.3.6, 19.2.9, 19.1.9, 19.0.10, 18.11.13GitLab Security Releases · Oct 21, 2026