CVE-2026-42576

MEDIUM

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

Title source: cna
STIX 2.1

Description

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.

References (3)

Core 3

Scores

CVSS v3 6.5
EPSS 0.0003
EPSS Percentile 10.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-704
Status published
Products (2)
chainguard-dev/apko < 1.2.7
chainguard.dev/apko 0 - 1.2.7Go
Published May 09, 2026
Tracked Since May 10, 2026