CVE-2025-12571

HIGH

GitLab CE/EE <18.4.5-18.6.1 - DoS

Title source: llm

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that could have allowed an unauthenticated user to cause a Denial of Service condition by sending specifically crafted requests containing malicious JSON payloads.

References (3)

[Broken Link] https://gitlab.com/gitlab-org/gitlab/-/issues/579168

[Permissions Required] https://hackerone.com/reports/3362239

[Release Notes] https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-released/

Scores

CVSS v3 7.5

EPSS 0.0008

EPSS Percentile 22.7%

Attack Vector NETWORK

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

Classification

CWE

CWE-770

Status published

Affected Products (4)

gitlab/gitlab < 18.4.5

gitlab/gitlab

Timeline

Published Nov 26, 2025

Tracked Since Feb 18, 2026