Vulnerability record · CVE-2026-30836 · published 19 March 2026

CVE-2026-30836: Smallstep step-ca improper authentication vulnerability

Smallstep · Step Ca

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.

10.0 CVSS 3.1 Critical EPSS 0.31% · top 78.8% CWE-287 · Improper authenticationCWE-295 · Improper certificate validation

10.0CVSS 3.1 base score

0.31%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Step Ca Smallstep

References

Link	Tags
https://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4ef	Patch
https://github.com/smallstep/certificates/releases/tag/v0.30.0-rc7	Release Notes
https://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gw	Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-30836), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.