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4 vulnerabilities found for by smallstep

CVE-2026-40097 (GCVE-0-2026-40097)
Vulnerability from cvelistv5
Published
2026-04-10 16:34
Modified
2026-04-10 18:30
Severity ?
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-129 - Improper Validation of Array Index
Summary
Step CA is an online certificate authority for secure, automated certificate management for DevOps. From 0.24.0 to before 0.30.0-rc3, an attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key (AK) certificate with an empty Extended Key Usage (EKU) extension during TPM device attestation. When processing a device-attest-01 ACME challenge using TPM attestation, Step CA validates that the AK certificate contains the tcg-kp-AIKCertificate Extended Key Usage OID. During this validation, the EKU extension value is decoded from its ASN.1 representation and the first element is checked. A crafted certificate could include an EKU extension that decodes to an empty sequence, causing the code to panic when accessing the first element of the empty slice. This vulnerability is only reachable when a device-attest-01 ACME challenge with TPM attestation is configured. Deployments not using TPM device attestation are not affected. This vulnerability is fixed in 0.30.0-rc3.
References
Impacted products
Vendor Product Version
smallstep certificates Version: >= 0.24.0, < 0.30.0-rc3
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CVE-2026-30836 (GCVE-0-2026-30836)
Vulnerability from cvelistv5
Published
2026-03-19 20:37
Modified
2026-03-25 14:16
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
  • CWE-295 - Improper Certificate Validation
Summary
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.
References
Impacted products
Vendor Product Version
smallstep certificates Version: < 0.30.0
 Create a notification for this product.
Show details on NVD website

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{
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CVE-2025-44005 (GCVE-0-2025-44005)
Vulnerability from cvelistv5
Published
2025-12-17 15:16
Modified
2025-12-17 18:00
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
Summary
An attacker can bypass authorization checks and force a Step CA ACME or SCEP provisioner to create certificates without completing certain protocol authorization checks.
References
Impacted products
Vendor Product Version
smallstep Step-CA Version: 0.28.4
Version: v0.28.3
 Create a notification for this product.
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CVE-2025-66406 (GCVE-0-2025-66406)
Vulnerability from cvelistv5
Published
2025-12-03 19:13
Modified
2025-12-03 21:40
Severity ?
5.0 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
CWE
  • CWE-863 - Incorrect Authorization
Summary
Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.
References
Impacted products
Vendor Product Version
smallstep certificates Version: < 0.29.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

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