by Kastro
Paper/Archive/CVE-2026-30836

CVE-2026-30836

smallstep certificates — Step CA: Unauthenticated Certificate Issuance via SCEP UpdateReq (MessageType=18)

EPSS 0.3%CVSS 10.0
critical.is priorityof 100
35
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 23.6.236 × 204.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
certificates< 0.30.0–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gwrefgithub.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4efrefgithub.com/smallstep/certificates/releases/tag/v0.30.0-rc7