CVE-2026-25121— apko is vulnerable to path traversal in apko dirFS which allows filesystem writes outside base
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I. Basic Information for CVE-2026-25121
Vulnerability Information
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Vulnerability Title
apko is vulnerable to path traversal in apko dirFS which allows filesystem writes outside base
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
相对路径遍历
Source: NVD (National Vulnerability Database)
Vulnerability Title
apko 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
apko是apko开源的一个基于 apk 的 OCI 镜像构建器。 apko 0.14.8版本至1.1.1之前版本存在安全漏洞，该漏洞源于dirFS文件系统抽象层存在路径遍历漏洞，可能导致在预期安装根目录外创建目录或符号链接。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| chainguard-dev | apko | >= 0.14.8, < 1.1.1 | - |
II. Public POCs for CVE-2026-25121
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · chainguard-dev · 2026-02-04 · 7 CVEs total
| CVE-2026-24843 | 8.2 HIGH | melange QEMU runner could write files outside workspace directory |
| CVE-2026-25143 | 7.8 HIGH | melange affected by potential host command execution via license-check YAML mode patch pip |
| CVE-2026-24844 | 7.8 HIGH | melange pipeline working-directory could allow command injection |
| CVE-2026-25140 | 7.5 HIGH | apko affected by potential unbounded resource consumption in expandapk.ExpandApk on attack |
| CVE-2026-25122 | 5.5 MEDIUM | apko is vulnerable to unbounded resource consumption in expandapk.Split on attacker-contro |
| CVE-2026-25145 | 5.5 MEDIUM | melange has a path traversal in license-path which allows reading files outside workspace |
IV. Related Vulnerabilities
Same product: apko
- CVE-2026-42576
apko `DiscoverKeys` has a panic on non-rsa jwks key that cau - CVE-2026-42575
apko doesn't verify downloaded apk packages against APKINDEX - CVE-2026-42574
apko dirFS has a symlink-following path traversal that allow - CVE-2026-25140
apko affected by potential unbounded resource consumption in - CVE-2026-25122
apko is vulnerable to unbounded resource consumption in expa
Same vendor: chainguard-dev
- CVE-2026-42576
apko `DiscoverKeys` has a panic on non-rsa jwks key that cau - CVE-2026-42575
apko doesn't verify downloaded apk packages against APKINDEX - CVE-2026-42574
apko dirFS has a symlink-following path traversal that allow - CVE-2026-29051
melange has Path Traversal via .PKGINFO in --persist-lint-re - CVE-2026-29050
melange has Path Traversal When Resolving External Pipelines
Same weakness: CWE-23
- CVE-2026-8209
Gibbon<30.0.01路径遍历漏洞导致拒绝服务 - CVE-2026-43533
OpenClaw < 2026.4.10 - Arbitrary Local File Read via QQBot M - CVE-2026-43616
Detect-It-Easy < 3.21 Path Traversal Arbitrary File Write - CVE-2026-42085
OpenC3 COSMOS: Arbitrary write to plugins directory via path - CVE-2026-22070
ColorOS Assistant Path Traversal Vulnerability
V. Comments for CVE-2026-25121
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