CVE-2026-12910
Received
Received - Intake
Authentication Bypass in GitLab CE/EE via SAML SSO
Vulnerability report for CVE-2026-12910, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-15
Last updated on: 2026-09-15
Assigner: GitLab Inc.
Description
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user to bypass SAML SSO sign-in restrictions and authenticate without SSO due to missing authentication enforcement checks.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gitlab | gitlab_ce | From 18.6 (inc) to 19.1.8 (exc) |
| gitlab | gitlab_ee | From 18.6 (inc) to 19.1.8 (exc) |
| gitlab | gitlab_ce | From 19.2.0 (inc) to 19.2.6 (exc) |
| gitlab | gitlab_ee | From 19.2.0 (inc) to 19.2.6 (exc) |
| gitlab | gitlab_ce | From 19.3.0 (inc) to 19.3.2 (exc) |
| gitlab | gitlab_ee | From 19.3.0 (inc) to 19.3.2 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-306 | The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. |
