{"id":"CVE-2026-15723","state":"PUBLISHED","title":"Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when OmniAuth SAML and LDAP auto-linking were both enabled, an authenticated user could have taken over an existing LDAP-backed account without any interaction from the targeted user, due to improper input sanitization in the LDAP email lookup path used during OmniAuth identity linking.","publishedAt":"2026-10-21T23:35:15.434Z","updatedAt":"2026-10-23T10:58:00.648Z","severity":{"score":8.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","source":"GitLab"},"assigner":"GitLab","products":["GitLab GitLab"],"affected":[{"vendor":"GitLab","product":"GitLab","defaultStatus":"unaffected","versions":[{"version":"10.1","status":"affected","lessThan":"19.3.6","versionType":"semver"},{"version":"19.4","status":"affected","lessThan":"19.4.3","versionType":"semver"},{"version":"19.5","status":"affected","lessThan":"19.5.1","versionType":"semver"}],"repo":"https://gitlab.com/gitlab-org/gitlab","cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"]}],"references":["https://gitlab.com/gitlab-org/gitlab/-/work_items/605977","https://hackerone.com/reports/3852192","https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/"],"weaknesses":["CWE-90"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/15xxx/CVE-2026-15723.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-15723","state":"PUBLISHED","datePublished":"2026-10-21T23:35:15.434Z","dateUpdated":"2026-10-23T10:58:00.648Z","assignerShortName":"GitLab","assignerOrgId":"ceab7361-8a18-47b1-92ba-4d7d25f6715a","dateReserved":"2026-07-14T13:04:45.612Z"},"containers":{"cna":{"title":"Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in GitLab","descriptions":[{"lang":"en","value":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when OmniAuth SAML and LDAP auto-linking were both enabled, an authenticated user could have taken over an existing LDAP-backed account without any interaction from the targeted user, due to improper input sanitization in the LDAP email lookup path used during OmniAuth identity linking."}],"affected":[{"vendor":"GitLab","product":"GitLab","defaultStatus":"unaffected","versions":[{"version":"10.1","status":"affected","lessThan":"19.3.6","versionType":"semver"},{"version":"19.4","status":"affected","lessThan":"19.4.3","versionType":"semver"},{"version":"19.5","status":"affected","lessThan":"19.5.1","versionType":"semver"}],"repo":"https://gitlab.com/gitlab-org/gitlab","cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"]}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/605977"},{"url":"https://hackerone.com/reports/3852192","name":"HackerOne Bug Bounty Report #3852192","tags":["technical-description","exploit","permissions-required"]},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-90","lang":"en","description":"CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitLab","orgId":"ceab7361-8a18-47b1-92ba-4d7d25f6715a","dateUpdated":"2026-10-21T23:35:15.434Z"},"solutions":[{"lang":"en","value":"Upgrade to versions 19.3.6, 19.4.3, 19.5.1 or above."}],"credits":[{"lang":"en","value":"Thanks [stealthy](https://hackerone.com/stealthy) for reporting this vulnerability through our HackerOne bug bounty program","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-23T03:55:20.114357Z","id":"CVE-2026-15723","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-23T10:58:00.648Z"}}]}}}