What’s Vulnerable › Vulnerabilities

CVE-2026-1659: Allocation of Resources Without Limits or Throttling in GitLab

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-770

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by sending specially crafted requests due to insufficient input validation.

Affected products

• GitLab: from 9.0.0 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/588201
• https://hackerone.com/reports/3519824

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