CVE-2026-42576 PUBLISHED

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

Assigner: GitHub_M
Reserved: 28.04.2026 Published: 09.05.2026 Updated: 09.05.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS Score: 6.5

Product Status

Vendor chainguard-dev
Product apko
Versions
  • Version < 1.2.7 is affected

References

Problem Types

  • CWE-704: Incorrect Type Conversion or Cast CWE