CVE Explorer
CVE-2026-1388
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","product":"GitLab","repo":"git://git@gitlab.com:gitlab-org/gitlab.git","vendor":"GitLab","versions":[{"lessThan":"18.7.5","status":"affected","version":"9.2","versionType":"semver"},{"lessThan":"18.8.5","status":"affected","version":"18.8","versionType":"semver"},{"lessThan":"18.9.1","status":"affected","version":"18.9","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80c458eebe6a940aad8a1be0f31fbec9f4d94711038a7313324282004cc103b7 · sha256:9cc288114eeb2ab5… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:80c458eebe6a940aad8a1be0f31fbec9f4d94711038a7313324282004cc103b7 · sha256:9cc288114eeb2ab5… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:80c458eebe6a940aad8a1be0f31fbec9f4d94711038a7313324282004cc103b7 · sha256:9cc288114eeb2ab5… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"url":"https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80c458eebe6a940aad8a1be0f31fbec9f4d94711038a7313324282004cc103b7 · sha256:9cc288114eeb2ab5… · /containers/cna/references/2
{"name":"GitLab Issue #587560","tags":["issue-tracking","permissions-required"],"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/587560"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80c458eebe6a940aad8a1be0f31fbec9f4d94711038a7313324282004cc103b7 · sha256:9cc288114eeb2ab5… · /containers/cna/references/0
{"name":"HackerOne Bug Bounty Report #3482893","tags":["technical-description","exploit","permissions-required"],"url":"https://hackerone.com/reports/3482893"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80c458eebe6a940aad8a1be0f31fbec9f4d94711038a7313324282004cc103b7 · sha256:9cc288114eeb2ab5… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.