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CVE-2026-5377

Incorrect Authorization in GitLab

CVSS 4.3 MEDIUMEPSS 0.2%CWE-863
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that could have allowed an authenticated user to access titles of confidential or private issues in public projects due to improper access control in the issue description rendering process.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products
GitLab · GitLab
public PoCs found — 1
cve_referencehackerone.com/reports/3640688unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/595553https://hackerone.com/reports/3640688