CVE-2026-42576CWE-704

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

Medium · published May 9, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
38.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00452 · 38.3th percentile
Weakness
CWE-704 · Incorrect Type Conversion or Cast
Published
2026-05-09T19:26Z
EPSS history
Timeline
  • 09 MAY 19:26Z
    apko `DiscoverKeys` has a panic on non-rsa jwks key that causes crash during key discovery
    cvelistv5