CVE-2025-12571

HIGH

GitLab 17.10-18.4.5, 18.5-18.5.3, 18.6-18.6.1 - Unauthenticated Denial of Service via Malicious JSON Payloads

Title source: llm
STIX 2.1

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)

Core 3
Core References
Broken Link issue-tracking permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/579168
Permissions Required technical-description exploit permissions-required
https://hackerone.com/reports/3362239

Scores

CVSS v3 7.5
EPSS 0.0011
EPSS Percentile 29.3%
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 none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (2)
gitlab/gitlab 18.6.0 (2 CPE variants)
gitlab/gitlab 17.10.0 - 18.4.5 (2 CPE variants)
Published Nov 26, 2025
Tracked Since Feb 18, 2026