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CVE-2026-5816

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f6d3472f8cbe8dbbbb3482133adf5e34dad5f82d55bf4aa278840a05f33a7d29
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":"18.10.4","status":"affected","version":"18.10","versionType":"semver"},{"lessThan":"18.11.1","status":"affected","version":"18.11","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4a30d1bc227e628929a54186a7d4a8bae2a719cb324486f9011ebd04d78eaa79 · sha256:0f288d8219a497a2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4a30d1bc227e628929a54186a7d4a8bae2a719cb324486f9011ebd04d78eaa79 · sha256:0f288d8219a497a2… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-41","description":"CWE-41: Improper Resolution of Path Equivalence","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4a30d1bc227e628929a54186a7d4a8bae2a719cb324486f9011ebd04d78eaa79 · sha256:0f288d8219a497a2… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4a30d1bc227e628929a54186a7d4a8bae2a719cb324486f9011ebd04d78eaa79 · sha256:0f288d8219a497a2… · /containers/cna/references/2
{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/592816"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4a30d1bc227e628929a54186a7d4a8bae2a719cb324486f9011ebd04d78eaa79 · sha256:0f288d8219a497a2… · /containers/cna/references/1
{"name":"HackerOne Bug Bounty Report #3572231","tags":["technical-description","exploit","permissions-required"],"url":"https://hackerone.com/reports/3572231"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4a30d1bc227e628929a54186a7d4a8bae2a719cb324486f9011ebd04d78eaa79 · sha256:0f288d8219a497a2… · /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.

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