{"id":"CVE-2026-109142","aliases":["EUVD-2026-115257","GHSA-p4hg-66rh-w2c8"],"status":"published","title":"Krill treats a \"local parent\" as already-authenticated, letting a CA operator act as any child of any CA on the same server","description":"When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.","severity":{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00276,"percentile":0.20251,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-11-02T15:42:13Z","modified":"2026-11-02T19:35:33Z","products":[{"vendor":"nlnet labs","product":"krill"}],"references":[{"url":"https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109142"},{"url":"https://github.com/advisories/GHSA-p4hg-66rh-w2c8"}],"sources":{"cve":[{"id":"CVE-2026-109142","title":"Krill treats a \"local parent\" as already-authenticated, letting a CA operator act as any child of any CA on the same server","description":"When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.","status":"published","published":"2026-11-02T15:42:13.364Z","modified":"2026-11-02T16:10:56.242Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T18:00:08.034842Z"}],"euvd":[{"id":"EUVD-2026-115257","description":"When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.","status":"published","published":"2026-11-02T15:42:13Z","modified":"2026-11-02T16:10:56Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high"}],"updated_at":"2026-11-03T05:08:40.251173Z"}],"ghsa":[{"id":"GHSA-p4hg-66rh-w2c8","title":"When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS...","description":"When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.","status":"published","published":"2026-11-02T18:32:25Z","modified":"2026-11-02T18:32:25Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T19:02:40.409728Z"}],"nvd":[{"id":"CVE-2026-109142","description":"When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.","status":"published","published":"2026-11-02T16:17:27.267Z","modified":"2026-11-02T19:35:33.347Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-03T00:02:42.67885Z"}]}}