CVE-2026-42576

CVE-2026-42576 affects chainguard/apko. Before v1.2.7, DiscoverKeys in pkg/apk/apk/implementation.go unconditionally type-asserts JWKS keys as *rsa.PublicKey without key-type checks. If a repository JWKS endpoint returns a non-RSA key (e.g., EC), an unchecked type assertion panics, crashing apko ...

GHSA-M7HM-VM4X-28JF apko `DiscoverKeys` has a panic on non-rsa jwks key that causes crash during key discovery

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...