{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12635","assignerOrgId":"ceab7361-8a18-47b1-92ba-4d7d25f6715a","state":"PUBLISHED","assignerShortName":"GitLab","dateReserved":"2026-06-18T15:33:33.153Z","datePublished":"2026-06-25T04:33:34.156Z","dateUpdated":"2026-06-25T13:25:43.223Z"},"containers":{"cna":{"title":"Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab","descriptions":[{"lang":"en","value":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with maintainer-role permissions to make requests to internal network resources through mirror synchronization due to improper URL validation."}],"affected":[{"vendor":"GitLab","product":"GitLab","repo":"git://git@gitlab.com:gitlab-org/gitlab.git","cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"],"versions":[{"version":"8.3","status":"affected","lessThan":"18.11.6","versionType":"semver"},{"version":"19.0","status":"affected","lessThan":"19.0.3","versionType":"semver"},{"version":"19.1","status":"affected","lessThan":"19.1.1","versionType":"semver"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action","cweId":"CWE-350","type":"CWE"}]}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/594321"},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-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:U/C:N/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":0,"baseSeverity":"NONE"}}],"solutions":[{"lang":"en","value":"Upgrade to versions 18.11.6, 19.0.3, 19.1.1 or above."}],"credits":[{"lang":"en","value":"This vulnerability has been discovered internally by GitLab team member Félix Veillette-Potvin","type":"finder"}],"providerMetadata":{"orgId":"ceab7361-8a18-47b1-92ba-4d7d25f6715a","shortName":"GitLab","dateUpdated":"2026-06-25T04:33:34.156Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T13:23:32.053651Z","id":"CVE-2026-12635","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-25T13:25:43.223Z"}}]}}