Skip to content
Fencer Vulns
medium 5.4

CVE-2026-12910 json

Missing Authentication for Critical Function in GitLab

published 2026-09-15 54 d ago modified 2026-09-28 41 d ago also BIT-gitlab-2026-12910 , EUVD-2026-78909

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami gitlab 19.1.8, 19.2.6, 19.3.2
  • GitLab GitLab 19.1.8, 19.2.6, 19.3.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
50 d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/3745561 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=18.6.0, <19.1.8
>=19.2.0, <19.2.6
>=19.3.0, <19.3.2
19.1.8
19.2.6
19.3.2

Affected products

  • GitLab GitLab

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.