CVE-2026-30836 | Step CA is an online certificate authority for secure, autom… | CVSS 10.0 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-30836
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-03-05 21:06 UTC
Published: 2026-03-19 20:37 UTC
Last updated: 2026-03-25 14:16 UTC
Primary CWE: CWE-287
CWE-287: Improper Authentication
Vendor / Product: smallstep / certificates
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
smallstep	certificates	—	< 0.30.0

Weakness (CWE)

CWE	Source	Description
CWE-287	cna	CWE-287: Improper Authentication
CWE-295	cna	CWE-295: Improper Certificate Validation

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

References (3)

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