CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3Tags
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.10 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an unauthenticated user to cause denial of service due to improper input validation of JSON payloads.
Analysis
Denial of service in GitLab CE/EE versions 12.10 through 18.8.8, 18.9 through 18.9.4, and 18.10 through 18.10.2 allows unauthenticated remote attackers to crash GitLab services via malformed JSON payloads. Improper input validation (CWE-1284) enables resource exhaustion attacks without authentication. …
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Remediation
Within 24 hours: Identify all GitLab CE/EE instances and document current versions using `gitlab-rake gitlab:env:info`. Within 7 days: Upgrade to GitLab 18.10.3 or later (verify availability via GitLab release notes). …
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-20789
GHSA-rp75-jg2c-frm4