What is CVE-2026-1660?

CVE-2026-1660 is a medium-severity vulnerability in Gitlab, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-04-22.

How severe is CVE-2026-1660?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Gitlab

CVE-2026-1660

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.3 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to cause denial of service…

EPSS: 0.001 (23.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Gitlab — versions 12.3, 18.10, 18.11

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

HackerOne Bug Bounty Report #3518743 (technical-description, exploit, permissions-required)
gitlab.com/gitlab-org/gitlab/-/work_items/588200
about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/

Frequently asked questions

What is CVE-2026-1660?: CVE-2026-1660 is a medium-severity vulnerability in Gitlab, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-04-22.
How severe is CVE-2026-1660?: Medium severity. CVSS v3 base score is 6.5 out of 10.