FKIE_CVE-2026-30836

Vulnerability from fkie_nvd - Published: 2026-03-19 21:17 - Updated: 2026-04-27 13:41
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
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
security-advisories@github.comhttps://github.com/smallstep/certificates/commit/e6da031d5125cfd99fe9a26f74bb41e4dacca4efPatch
security-advisories@github.comhttps://github.com/smallstep/certificates/releases/tag/v0.30.0-rc7Release Notes
security-advisories@github.comhttps://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gwVendor Advisory
Impacted products
Vendor Product Version
smallstep step-ca *
smallstep step-ca 0.30.0
smallstep step-ca 0.30.0
smallstep step-ca 0.30.0
smallstep step-ca 0.30.0
smallstep step-ca 0.30.0
smallstep step-ca 0.30.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:smallstep:step-ca:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "55DF2401-9601-4B51-9AB2-86A19579AC41",
              "versionEndExcluding": "0.30.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:smallstep:step-ca:0.30.0:rc1:*:*:*:go:*:*",
              "matchCriteriaId": "D49EF50A-2928-4577-A5AD-0CD81C9E1AE8",
              "vulnerable": true
            },
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              "matchCriteriaId": "E238C89C-4A97-4FA1-8DE0-9FE51CDF59B9",
              "vulnerable": true
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              "vulnerable": true
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              "matchCriteriaId": "0307DFDF-481F-4AAB-B763-6DB8B6C7A26E",
              "vulnerable": true
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              "matchCriteriaId": "D90ACCF3-B841-424A-ADA8-C957ED6A900F",
              "vulnerable": true
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "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."
    },
    {
      "lang": "es",
      "value": "Step CA es una autoridad de certificaci\u00f3n en l\u00ednea para la gesti\u00f3n de certificados segura y automatizada para DevOps. Las versiones 0.30.0-rc6 e inferiores no protegen contra la emisi\u00f3n de certificados no autenticada a trav\u00e9s de la solicitud SCEP UpdateReq. Este problema ha sido corregido en la versi\u00f3n 0.30.0."
    }
  ],
  "id": "CVE-2026-30836",
  "lastModified": "2026-04-27T13:41:54.727",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 10.0,
          "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.8,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-19T21:17:09.783",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "tags": [
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    },
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/smallstep/certificates/security/advisories/GHSA-q4r8-xm5f-56gw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        },
        {
          "lang": "en",
          "value": "CWE-295"
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      "type": "Primary"
    },
    {
      "description": [
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          "value": "CWE-295"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.