CVE Explorer
CVE-2026-3254
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to load unauthorized content into another user's browser due to improper input validation in the Mermaid sandbox.
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":"18.11.1","status":"affected","version":"18.11","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:9c1fa6d0da3eb699dd18cfa3af118e69069860ee2b9085e04839d66df151e085 · sha256:2b2457136762736a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:9c1fa6d0da3eb699dd18cfa3af118e69069860ee2b9085e04839d66df151e085 · sha256:2b2457136762736a… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1021","description":"CWE-1021: Improper Restriction of Rendered UI Layers or Frames","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:9c1fa6d0da3eb699dd18cfa3af118e69069860ee2b9085e04839d66df151e085 · sha256:2b2457136762736a… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/591587"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:9c1fa6d0da3eb699dd18cfa3af118e69069860ee2b9085e04839d66df151e085 · sha256:2b2457136762736a… · /containers/cna/references/1
{"name":"HackerOne Bug Bounty Report #3572752","tags":["technical-description","exploit","permissions-required"],"url":"https://hackerone.com/reports/3572752"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:9c1fa6d0da3eb699dd18cfa3af118e69069860ee2b9085e04839d66df151e085 · sha256:2b2457136762736a… · /containers/cna/references/0
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.