{"id":"CVE-2026-30836","aliases":["GHSA-q4r8-xm5f-56gw","GO-2026-4775"],"url":"https://o3.security/vulnerability/CVE-2026-30836","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.","published":"2026-03-19T20:37:05.757Z","modified":"2026-08-12T03:51:17.135224235Z","cvss":{"score":10,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"},"epss":{"score":0.00296,"percentile":0.22355,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/smallstep/certificates","fixedVersion":"0.30.0"}],"fix":{"url":"https://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4ef","label":"smallstep/certificates@e6da031"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:17.135224235Z"}}