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Fencer Vulns
medium 5.3

CVE-2020-26406 json

Certain SAST CiConfiguration information could be viewed by unauthorized users in GitLab EE starting with 13.3.

published 2020-11-17 5 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2020-26406 , EUVD-2020-18953

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

Certain SAST CiConfiguration information could be viewed by unauthorized users in GitLab EE starting with 13.3. This information was exposed through GraphQL to non-members of public projects with repository visibility restricted as well as guest members on private projects. Affected versions are: >=13.3, <13.3.9,>=13.4, <13.4.5,>=13.5, <13.5.2.

Patch / fix

  • bitnami gitlab 13.3.9, 13.4.5, 13.5.2
  • gitlab gitlab 13.3.9, 13.4.5, 13.5.2
  • gitlab gitlab_enterprise 13.3.9, 13.4.5, 13.5.2

Exploit prediction

1.44% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=13.3.0, <13.3.9
>=13.4.0, <13.4.5
>=13.5.0, <13.5.2
13.3.9
13.4.5
13.5.2

Affected products

  • GitLab GitLab EE

Classification

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: add affected deb and rpm records.