{"schema_version":"1.9.0","id":"CVE-2026-30836","published":"2026-03-19T20:37:05.757Z","modified":"2026-08-12T03:51:17.135224235Z","aliases":["GHSA-q4r8-xm5f-56gw","GO-2026-4775"],"related":["CGA-cx83-mwx5-9w47","SUSE-SU-2026:1135-1","openSUSE-SU-2026:21483-1"],"summary":"Step CA: Unauthenticated Certificate Issuance via SCEP UpdateReq (MessageType=18)","details":"Step CA is an online certificate authority for secure, automated certificate management for DevOps. Versions 0.30.0-rc6 and below do not safeguard against unauthenticated certificate issuance through the SCEP UpdateReq. This issue has been fixed in version 0.30.0.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/smallstep/certificates","events":[{"introduced":"0"},{"fixed":"d34619c55e5cd46ce08d8bdb8c846df2c4d8aca0"},{"introduced":"a7ceb2d08b9d11406d8168c5d0aae098fd38a481"},{"fixed":"e6da031d5125cfd99fe9a26f74bb41e4dacca4ef"}],"database_specific":{"cpe":["cpe:2.3:a:smallstep:step-ca:*:*:*:*:*:go:*:*","cpe:2.3:a:smallstep:step-ca:0.30.0:rc1:*:*:*:go:*:*","cpe:2.3:a:smallstep:step-ca:0.30.0:rc2:*:*:*:go:*:*","cpe:2.3:a:smallstep:step-ca:0.30.0:rc3:*:*:*:go:*:*","cpe:2.3:a:smallstep:step-ca:0.30.0:rc4:*:*:*:go:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"0.30.0"},{"introduced":"0.30.0-rc1"},{"last_affected":"0.30.0-rc1"},{"introduced":"0.30.0-rc2"},{"last_affected":"0.30.0-rc2"},{"introduced":"0.30.0-rc3"},{"last_affected":"0.30.0-rc3"},{"introduced":"0.30.0-rc4"},{"last_affected":"0.30.0-rc4"}],"source":["CPE_RANGE","CPE_STRING","REFERENCES"]}}],"versions":["0.30.0-rc1","0.30.0-rc2","0.30.0-rc3","0.30.0-rc4","v0.30.0-rc4","v0.30.0-rc3","v0.30.0-rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30836.json"}}],"references":[{"type":"WEB","url":"https://github.com/smallstep/certificates/releases/tag/v0.30.0-rc7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30836.json"},{"type":"ADVISORY","url":"https://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30836"},{"type":"FIX","url":"https://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4ef"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-287","CWE-295"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30836.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"}]}