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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

Published: May 9, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-22
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 71.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-22CWE-59

Affected Products

chainguard-dev
commercialaka chainguard.dev
apkoMixed
DevTools & CI / build-test-tools

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/chainguard-dev/apko/commit/f5a96e1299ac81c7ea9441705ec467688086f442
github.com
https://github.com/chainguard-dev/apko/pull/2187
github.com
https://github.com/chainguard-dev/apko/releases/tag/v1.2.5
github.com
and 1 more references View all →

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