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CVE-2026-42574
apko dirFS has a symlink-following path traversal that allows multiple entry points to escape the build root
High7.5EPSS 0.35%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before version 1.2.5, a crafted .apk could install a TypeSymlink tar entry whose target pointed outside the build root, and a subsequent directory-creation or file-write entry in the same or later archive could traverse that symlink to reach host paths the build user could write to. This issue has been patched in version 1.2.5.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVDNVD · Deferred | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.35% · top 71% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected >= 0.14.8, < 1.2.5
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gochainguard.dev/apkoGHSA-qq3r-w4hj-gjp6 (opens in a new tab)
References (4)
- https://github.com/chainguard-dev/apko/security/advisories/GHSA-qq3r-w4hj-gjp6 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/chainguard-dev/apko/pull/2187 (opens in a new tab)x_refsource_MISC
- https://github.com/chainguard-dev/apko/commit/f5a96e1299ac81c7ea9441705ec467688086f442 (opens in a new tab)x_refsource_MISC
- https://github.com/chainguard-dev/apko/releases/tag/v1.2.5 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-qq3r-w4hj-gjp6 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-42574)Record last updated .