CVE-2026-1662

HIGH

GitLab 14.4-18.7.4, 18.8-18.8.4, 18.9-18.9.0 - Unauthenticated Denial of Service via Jira Events Endpoint

Title source: llm

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.4 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause Denial of Service by sending specially crafted requests to the Jira events endpoint.

References (3)

Core 3

Core References

Release Notes

https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/

Issue Tracking issue-tracking permissions-required

https://gitlab.com/gitlab-org/gitlab/-/issues/588206

Third Party Advisory technical-description exploit permissions-required

https://hackerone.com/reports/3519694

Scores

CVSS v3 7.5

EPSS 0.0036

EPSS Percentile 27.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (2)

gitlab/gitlab 18.9.0 (2 CPE variants)

gitlab/gitlab 14.4.0 - 18.7.5 (2 CPE variants)

Published Feb 25, 2026

Tracked Since Feb 26, 2026