{"id":"CVE-2026-12635","aliases":["BIT-gitlab-2026-12635","EUVD-2026-39168","GHSA-px7v-hx94-8wmf"],"status":"published","title":"Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab","description":"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.","severity":{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N","level":"none","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00249,"percentile":0.16323,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-350"],"published":"2026-06-25T04:33:34Z","modified":"2026-10-30T10:30:18Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["18.11.6","19.0.3","19.1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"8.3.0"},{"fixed":"18.11.6"},{"introduced":"19.0.0"},{"fixed":"19.0.3"},{"introduced":"19.1.0"},{"fixed":"19.1.1"}]}]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/594321","tags":["Broken Link","web"]},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/","tags":["Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12635","tags":["web","advisory"]},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released"},{"url":"https://github.com/advisories/GHSA-px7v-hx94-8wmf"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12635.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-12635","title":"Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab","description":"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.","status":"published","published":"2026-06-25T04:33:34.156Z","modified":"2026-06-25T13:25:43.223Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N","level":"none","assessor":"cna"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T14:19:48.461833Z"}],"euvd":[{"id":"EUVD-2026-39168","description":"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.","status":"published","published":"2026-06-25T04:33:34Z","modified":"2026-06-25T13:25:43Z","updated_at":"2026-11-02T18:20:29.213001Z"}],"ghsa":[{"id":"GHSA-px7v-hx94-8wmf","title":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.11.6, 19...","description":"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.","status":"published","published":"2026-06-25T06:30:42Z","modified":"2026-06-25T06:30:43Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T15:08:58.724463Z"}],"nvd":[{"id":"CVE-2026-12635","description":"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.","status":"published","published":"2026-06-25T05:16:51.17Z","modified":"2026-06-26T18:29:37.46Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N","level":"none","assessor":"secondary"},{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T14:12:25.67873Z"}],"osv":[{"id":"CVE-2026-12635","title":"Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab","description":"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.","status":"published","published":"2026-06-25T04:33:34.156Z","modified":"2026-10-30T10:30:18.265819274Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T15:44:57.354194Z"},{"id":"BIT-gitlab-2026-12635","title":"Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab","description":"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.","status":"published","published":"2026-06-29T06:01:01.803Z","modified":"2026-09-08T08:48:11.994767471Z","updated_at":"2026-11-02T15:28:30.70064Z"}]}}