FKIE_CVE-2026-42576

Vulnerability from fkie_nvd - Published: 2026-05-09 20:16 - Updated: 2026-07-24 20:10
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
apko allows users to build and publish OCI container images built from apk packages. Prior to version 1.2.7, DiscoverKeys in pkg/apk/apk/implementation.go unconditionally type-asserts JWKS keys as *rsa.PublicKey without checking the key type. If a repository JWKS endpoint returns a non-RSA key (e.g. EC), the unchecked assertion panics and crashes apko. This affects any workflow that initializes the APK database and fetches repository keys. This issue has been patched in version 1.2.7.
References
security-advisories@github.comhttps://github.com/chainguard-dev/apko/commit/6604826b19e36e9bc6e196592800fad93738f4a1
security-advisories@github.comhttps://github.com/chainguard-dev/apko/releases/tag/v1.2.7
security-advisories@github.comhttps://github.com/chainguard-dev/apko/security/advisories/GHSA-m7hm-vm4x-28jf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "apko",
          "vendor": "chainguard-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.2.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "apko allows users to build and publish OCI container images built from apk packages. Prior to version 1.2.7, DiscoverKeys in pkg/apk/apk/implementation.go unconditionally type-asserts JWKS keys as *rsa.PublicKey without checking the key type. If a repository JWKS endpoint returns a non-RSA key (e.g. EC), the unchecked assertion panics and crashes apko. This affects any workflow that initializes the APK database and fetches repository keys. This issue has been patched in version 1.2.7."
    },
    {
      "lang": "es",
      "value": "apko permite a los usuarios construir y publicar im\u00e1genes de contenedor OCI construidas a partir de paquetes apk. Antes de la versi\u00f3n 1.2.7, DiscoverKeys en pkg/apk/apk/implementation.go afirma el tipo de las claves JWKS incondicionalmente como rsa.PublicKey sin verificar el tipo de clave. Si un endpoint JWKS de repositorio devuelve una clave que no es RSA (p. ej., EC), la aserci\u00f3n no verificada entra en p\u00e1nico y bloquea apko. Esto afecta a cualquier flujo de trabajo que inicializa la base de datos APK y obtiene las claves del repositorio. Este problema ha sido parcheado en la versi\u00f3n 1.2.7."
    }
  ],
  "id": "CVE-2026-42576",
  "lastModified": "2026-07-24T20:10:00.147",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42576",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-11T14:57:52.451771Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-09T20:16:29.717",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/chainguard-dev/apko/commit/6604826b19e36e9bc6e196592800fad93738f4a1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/chainguard-dev/apko/releases/tag/v1.2.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-m7hm-vm4x-28jf"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-704"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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