Medium 6.5Published May 9, 2026

CVE-2026-42576apko `DiscoverKeys` has a panic on non-rsa jwks key that causes crash during key discovery

Updated under an hour ago (Oct 26, 2026, 12:10 PM ET)

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It affects chainguard-dev apko. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for chainguard-dev apko

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-704
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

chainguard-dev apko chainguard_dev:apko (from the name)	before 1.2.7	CNA record

References

https://github.com/chainguard-dev/apko/security/advisories/GHSA-m7hm-vm4x-28jfx-refsource-confirm
https://github.com/chainguard-dev/apko/commit/6604826b19e36e9bc6e196592800fad93738f4a1x-refsource-misc
https://github.com/chainguard-dev/apko/releases/tag/v1.2.7x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.