What is CVE-2026-25121?

CVE-2026-25121 is a high-severity vulnerability in Chainguard Apko, classified under Relative Path Traversal. CVSS score: 7.5/10. Published 2026-02-04.

How severe is CVE-2026-25121?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Chainguard Apko

CVE-2026-25121

apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.1, a path traversal vulnerability was discovered in apko's dirFS filesystem abstraction. An attacker who can supply a ma…

EPSS: 0.004 (29.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Chainguard Apko
Chainguard-dev Apko — versions >= 0.14.8, < 1.1.1

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-25121?: CVE-2026-25121 is a high-severity vulnerability in Chainguard Apko, classified under Relative Path Traversal. CVSS score: 7.5/10. Published 2026-02-04.
How severe is CVE-2026-25121?: High severity. CVSS v3 base score is 7.5 out of 10.