CVE-2026-42576 (GCVE-0-2026-42576)
Vulnerability from cvelistv5
Published
2026-05-09 19:26
Modified
2026-05-11 14:57
CWE
  • CWE-704 - Incorrect Type Conversion or Cast
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.
Impacted products
Vendor Product Version
chainguard-dev apko Version: < 1.2.7
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Show details on NVD website


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              "content": {
                "id": "CVE-2026-42576",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T14:57:52.451771Z",
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        }
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      "metrics": [
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            "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",
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "references": [
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          "tags": [
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          "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-m7hm-vm4x-28jf"
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    "dateReserved": "2026-04-28T17:26:12.085Z",
    "dateUpdated": "2026-05-11T14:57:58.452Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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