CVE-2026-30836 PUBLISHED

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

Assigner: GitHub_M
Reserved: 05.03.2026 Published: 19.03.2026 Updated: 19.03.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS Score: 10

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	smallstep
Product	certificates
Versions	Version < 0.30.0 is affected

References

https://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gw
https://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4ef
https://github.com/smallstep/certificates/releases/tag/v0.30.0-rc7

Problem Types

CWE-287: Improper Authentication CWE
CWE-295: Improper Certificate Validation CWE