What is CVE-2026-42576?

CVE-2026-42576 is a medium-severity vulnerability in Chainguard-dev Apko, classified under Incorrect Type Conversion or Cast. CVSS score: 6.5/10. Published 2026-05-09.

How severe is CVE-2026-42576?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Chainguard-dev Apko

CVE-2026-42576

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 ty…

EPSS: 0.000 (10.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Chainguard-dev Apko — versions < 1.2.7

Weakness classification (CWE)

CWE-704 — Incorrect Type Conversion or Cast

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42576?: CVE-2026-42576 is a medium-severity vulnerability in Chainguard-dev Apko, classified under Incorrect Type Conversion or Cast. CVSS score: 6.5/10. Published 2026-05-09.
How severe is CVE-2026-42576?: Medium severity. CVSS v3 base score is 6.5 out of 10.