CVE-2026-0958

HIGH

GitLab 18.4-18.6.5, 18.7-18.7.3, 18.8-18.8.3 - Unauthenticated Denial of Service via JSON Validation Middleware Bypass

Title source: llm
STIX 2.1

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.4 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through memory or CPU exhaustion by bypassing JSON validation middleware limits.

References (3)

Core 3
Core References
Broken Link, Issue Tracking issue-tracking permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/586202
Permissions Required technical-description exploit permissions-required
https://hackerone.com/reports/3463363

Scores

CVSS v3 7.5
EPSS 0.0039
EPSS Percentile 30.2%
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-436
Status published
Products (1)
gitlab/gitlab 18.4.0 - 18.6.6 (2 CPE variants)
Published Feb 11, 2026
Tracked Since Feb 18, 2026