Vulnerability · Published May 14, 2026 · Assigned by GitLab
CVE-2026-3160Unintended Proxy or Intermediary ('Confused Deputy') in GitLab
Medium 5.8
In plain English
A medium-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS 3.1)5.8Medium
Exploit odds (30 days)0.2%top 86.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user to view Jira issues outside the configured project scope due to an integration filter functioning only as a display control rather than enforcing access boundaries as specified.
Affected products (as reported)
Weakness: CWE-441 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
References
- HackerOne Bug Bounty Report #3566042 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/591354
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/