CVE-2026-1388: high-severity vulnerability in GitLab
Inefficient Regular Expression Complexity in GitLab
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
exploitation probability
0.4%top 72% of all CVEs
observed exploitation
nono source reports it
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.2 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 regular expression denial of service by sending specially crafted input to a merge request endpoint under certain conditions.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
GitLab · GitLabRelated CVEs — GitLab
In the same product, most dangerous first.
CVE-2021-22205CRITICALCVE-2021-22205EPSS 99.7%KEVCVE-2023-7028CRITICALWeak Password Recovery Mechanism for Forgotten Password in GitLabEPSS 94.6%KEVCVE-2026-85706CRITICALImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLabEPSS 93.0%KEVCVE-2021-22175MEDIUMCVE-2021-22175EPSS 53.4%KEVCVE-2021-39935MEDIUMCVE-2021-39935EPSS 36.1%KEVCVE-2023-2442HIGHCVE-2023-2442EPSS 96.1%