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Fencer Vulns
low 3.7

CVE-2026-6976 json

Authorization Bypass Through User-Controlled Key in GitLab

published 2026-06-11 4 mo ago modified 2026-09-08 2 mo ago also BIT-gitlab-2026-6976 , EUVD-2026-36228

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes from merge request diff views due to improper input handling of file names.

Patch / fix

  • bitnami gitlab 18.10.8, 18.11.5, 19.0.2
  • GitLab GitLab 18.10.8, 18.11.5, 19.0.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/3638136 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
OSV 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=15.9.0, <18.10.8
>=18.11.0, <18.11.5
>=19.0.0, <19.0.2
18.10.8
18.11.5
19.0.2

Affected products

  • GitLab GitLab

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key
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.