TI-2026-30856 Aliases CVE-2026-42576 GHSA-m7hm-vm4x-28jf

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

LOW 28CWE-704Published 2026-05-09 · Updated 2026-05-11

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-704 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00252 16th percentileScored 2026-11-07

Fix Fixed apko (chainguard-dev): 1.2.7chainguard.dev/apko (Go): 1.2.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
chainguard-dev	apko	before 1.2.7	1.2.7	Patch available	CNA
—	chainguard.dev/apko (Go)	before 1.2.7	1.2.7	Patch available	GHSA-m7hm-vm4x-28jf

apko Vendorchainguard-dev Affected before 1.2.7 Fixed in 1.2.7 Patch available CNA
chainguard.dev/apko (Go) Vendor— Affected before 1.2.7 Fixed in 1.2.7 Patch available GHSA-m7hm-vm4x-28jf

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:chainguard:apko::::::::	—	—	chainguard-dev

cpe:2.3:a:chainguard:apko:*:*:*:*:*:*:*:* Versions — — ·chainguard-dev

Remediation

Fix · CNA apko (chainguard-dev) Fixed in 1.2.7
Fix · GHSA-m7hm-vm4x-28jf chainguard.dev/apko (Go) Fixed in 1.2.7 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-42576
2026-10-03 Alias added: GHSA-m7hm-vm4x-28jf

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-42576

Other 4

TI-2024-23955 apko Exposure of HTTP basic auth credentials in log output CVSS 3.1HIGH 7.5
TI-2026-22680 kaniko has tar archive path traversal in build context extraction allows writing files outside destination directory CVSS 3.1HIGH 8.2
TI-2026-83911 kaniko sends Azure access tokens to lookalike ACR registry hosts CVSS 3.1CRITICAL 9.3
TI-2026-30854 apko dirFS has a symlink-following path traversal that allows multiple entry points to escape the build root CVSS 3.1HIGH 7.5
TI-2026-20302 apko affected by potential unbounded resource consumption in expandapk.ExpandApk on attacker-controlled .apk streams CVSS 3.1HIGH 7.5
TI-2026-20284 apko is vulnerable to path traversal in apko dirFS which allows filesystem writes outside base CVSS 3.1HIGH 7.5

See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences