CVE Tools
Sign in

CVE-2026-25121

apko is vulnerable to path traversal in apko dirFS which allows filesystem writes outside base

Published: Feb 4, 2026Updated: Feb 20, 2026 Sources: CVE List NVD GHSACWE-23
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 68.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch 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 1.1.1, a path traversal vulnerability was discovered in apko's dirFS filesystem abstraction. An attacker who can supply a malicious APK package (e.g., via a compromised or typosquatted repository) could create directories or symlinks outside the intended installation root. The MkdirAll, Mkdir, and Symlink methods in pkg/apk/fs/rwosfs.go use filepath.Join() without validating that the resulting path stays within the base directory. This issue has been patched in version 1.1.1.

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
Open in CVSS calculator →

Weaknesses

CWE-23CWE-22

Affected Products

chainguard
oss-project
apkoMixed
DevTools & CI / build-test-tools
chainguard-dev
commercialaka chainguard.dev
apkoMixed
DevTools & CI / build-test-tools
Go
package-ecosystem
chainguard.dev/apko
OSS Libraries

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-25121?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/chainguard-dev/apko/commit/d8b7887a968a527791b3c591ae83928cb49a9f14
github.com
https://github.com/chainguard-dev/apko/security/advisories/GHSA-5g94-c2wx-8pxw
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-25121
nvd.nist.gov
and 1 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-25121 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows