Search criteria
ⓘ
Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.
4 vulnerabilities by smallstep
CVE-2026-40097 (GCVE-0-2026-40097)
Vulnerability from cvelistv5 – Published: 2026-04-10 16:34 – Updated: 2026-04-10 18:30
VLAI?
Title
Step CA affected by an index out of bounds panic in TPM attestation EKU validation
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.
Severity ?
CWE
- CWE-129 - Improper Validation of Array Index
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| smallstep | certificates |
Affected:
>= 0.24.0, < 0.30.0-rc3
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-40097",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-10T18:30:05.878982Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-10T18:30:15.176Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "certificates",
"vendor": "smallstep",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.24.0, \u003c 0.30.0-rc3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 3.7,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-129",
"description": "CWE-129: Improper Validation of Array Index",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-10T16:34:53.330Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/smallstep/certificates/security/advisories/GHSA-9qq8-cgcv-qmc9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/smallstep/certificates/security/advisories/GHSA-9qq8-cgcv-qmc9"
},
{
"name": "https://github.com/smallstep/certificates/pull/2569",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/smallstep/certificates/pull/2569"
},
{
"name": "https://github.com/smallstep/certificates/commit/ffd31ac0a87e03b0224cb8363094bfe602242888",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/smallstep/certificates/commit/ffd31ac0a87e03b0224cb8363094bfe602242888"
},
{
"name": "https://github.com/smallstep/certificates/releases/tag/v0.30.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/smallstep/certificates/releases/tag/v0.30.0"
}
],
"source": {
"advisory": "GHSA-9qq8-cgcv-qmc9",
"discovery": "UNKNOWN"
},
"title": "Step CA affected by an index out of bounds panic in TPM attestation EKU validation"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-40097",
"datePublished": "2026-04-10T16:34:53.330Z",
"dateReserved": "2026-04-09T01:41:38.536Z",
"dateUpdated": "2026-04-10T18:30:15.176Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-30836 (GCVE-0-2026-30836)
Vulnerability from cvelistv5 – Published: 2026-03-19 20:37 – Updated: 2026-03-25 14:16
VLAI?
Title
Step CA: Unauthenticated Certificate Issuance via SCEP UpdateReq (MessageType=18)
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.
Severity ?
10 (Critical)
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| smallstep | certificates |
Affected:
< 0.30.0
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-30836",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-25T14:15:50.363882Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T14:16:09.012Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "certificates",
"vendor": "smallstep",
"versions": [
{
"status": "affected",
"version": "\u003c 0.30.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "CWE-287: Improper Authentication",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-295",
"description": "CWE-295: Improper Certificate Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-19T20:37:05.757Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gw",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gw"
},
{
"name": "https://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4ef",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4ef"
},
{
"name": "https://github.com/smallstep/certificates/releases/tag/v0.30.0-rc7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/smallstep/certificates/releases/tag/v0.30.0-rc7"
}
],
"source": {
"advisory": "GHSA-q4r8-xm5f-56gw",
"discovery": "UNKNOWN"
},
"title": "Step CA: Unauthenticated Certificate Issuance via SCEP UpdateReq (MessageType=18)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-30836",
"datePublished": "2026-03-19T20:37:05.757Z",
"dateReserved": "2026-03-05T21:06:44.606Z",
"dateUpdated": "2026-03-25T14:16:09.012Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-44005 (GCVE-0-2025-44005)
Vulnerability from cvelistv5 – Published: 2025-12-17 15:16 – Updated: 2025-12-17 18:00
VLAI?
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.
Severity ?
10 (Critical)
CWE
- CWE-287 - Improper Authentication
Assigner
References
Credits
Stephen Kubik of the Cisco Advanced Security Initiatives Group (ASIG)
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-44005",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-17T15:37:57.395652Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-12-17T15:40:26.757Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-12-17T17:06:18.202Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2242"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Step-CA",
"vendor": "smallstep",
"versions": [
{
"status": "affected",
"version": "0.28.4"
},
{
"status": "affected",
"version": "v0.28.3"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Stephen Kubik of the Cisco Advanced Security Initiatives Group (ASIG)"
}
],
"descriptions": [
{
"lang": "en",
"value": "An attacker can bypass authorization checks and force a Step CA ACME or SCEP provisioner to create certificates without completing certain protocol authorization checks."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "CWE-287: Improper Authentication",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-12-17T18:00:09.151Z",
"orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"shortName": "talos"
},
"references": [
{
"name": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2242",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2242"
},
{
"name": "https://github.com/smallstep/certificates/security/advisories/GHSA-h8cp-697h-8c8p",
"url": "https://github.com/smallstep/certificates/security/advisories/GHSA-h8cp-697h-8c8p"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"assignerShortName": "talos",
"cveId": "CVE-2025-44005",
"datePublished": "2025-12-17T15:16:16.495Z",
"dateReserved": "2025-07-28T19:00:54.642Z",
"dateUpdated": "2025-12-17T18:00:09.151Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-66406 (GCVE-0-2025-66406)
Vulnerability from cvelistv5 – Published: 2025-12-03 19:13 – Updated: 2025-12-03 21:40
VLAI?
Title
Improper Authorization Check for SSH Certificate Revocation
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.
Severity ?
5 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| smallstep | certificates |
Affected:
< 0.29.0
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-66406",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-03T21:40:49.793375Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-12-03T21:40:59.681Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "certificates",
"vendor": "smallstep",
"versions": [
{
"status": "affected",
"version": "\u003c 0.29.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863: Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-12-03T19:13:48.240Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr"
}
],
"source": {
"advisory": "GHSA-j7c9-79x7-8hpr",
"discovery": "UNKNOWN"
},
"title": "Improper Authorization Check for SSH Certificate Revocation"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2025-66406",
"datePublished": "2025-12-03T19:13:48.240Z",
"dateReserved": "2025-11-28T23:33:56.365Z",
"dateUpdated": "2025-12-03T21:40:59.681Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}