# CVE-2026-12910: Missing Authentication for Critical Function in GitLab

> CVE-2026-12910: Missing Authentication for Critical Function in GitLab. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-12910
Last updated: 2026-09-28T20:04:41Z

- Published: 2026-09-15 17:36 UTC · Updated: 2026-09-28 20:04 UTC · Assigner: GitLab
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- EPSS: 0.34%, 27th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-306

## 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.

## Affected vendors and products

- GitLab: GitLab

## Tracked companies

- [GitLab](https://rewindex.com/company/gitlab.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-12910)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-12910)
- [https://gitlab.com/gitlab-org/gitlab/-/work\_items/603742](https://gitlab.com/gitlab-org/gitlab/-/work_items/603742)
- [https://hackerone.com/reports/3745561](https://hackerone.com/reports/3745561)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-12910 · Markdown: https://rewindex.com/cve/CVE-2026-12910.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-12910 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:06:18.279Z