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VulnerabilityPublished

CVE-2026-5377: GitLab · Incorrect Authorization

Affects GitLabSource GCVE Database

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Not known to be exploited · CVSS 4.3 Medium · fixed in 18.11.1 : update GitLab when convenient.

Data as of 12 Nov 2026, 00:47 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitLab)CVSS 3.14.3
Patch
Available – fixed in 18.11.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubgitlab-org/gitlabpkg:github/gitlab-org/gitlabOther threatsAffected
  • =18.11
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade GitLab CE/EE from version 18.11 to 18.11.1 or later, where this authorization issue has been fixed. No additional mitigation is required once the patch is applied.

Description

CVE-2026-5377 is an authorization vulnerability in GitLab CE/EE version 18.11 that allowed authenticated users to view titles of confidential or private issues in public projects. The flaw was due to improper access control in the issue description rendering process. This issue was fixed in version 18.11.1.

References

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