What’s Vulnerable › Vulnerabilities

CVE-2026-3160: Unintended Proxy or Intermediary ('Confused Deputy') in GitLab

• Severity: medium (CVSS 5.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-14 · updated 2026-06-17
• Weakness: CWE-441

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

• GitLab: from 13.7.0 before 18.9.7; from 18.10.0 before 18.10.6; from 18.11.0 before 18.11.3 — fixed in 18.10.6, 18.11.3, 18.9.7

How to fix

Upgrade to a fixed version: GitLab 18.10.6, 18.11.3, 18.9.7. Check the vendor advisory for mitigations.

References

• https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/591354
• https://hackerone.com/reports/3566042

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