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CVE-2026-24843— melange QEMU runner could write files outside workspace directory

Quick assessment

Affected
chainguard-dev melange
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

melange是Chainguard开源的一个从源代码构建APK的软件。 melange 0.40.3之前版本存在路径遍历漏洞，该漏洞源于提取tar归档时未验证路径，可能导致路径遍历攻击。

CVSS 8.2 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-24843

Vulnerability Information
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Vulnerability Title
melange QEMU runner could write files outside workspace directory
Source: CVE Program / CVE List V5
Vulnerability Description
melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
melange 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
melange是Chainguard开源的一个从源代码构建APK的软件。 melange 0.40.3之前版本存在路径遍历漏洞，该漏洞源于提取tar归档时未验证路径，可能导致路径遍历攻击。
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 melange >= 0.11.3, < 0.40.3 -

II. Public POCs for CVE-2026-24843

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III. Intelligence Information for CVE-2026-24843

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Patches & Fixes for CVE-2026-24843 (1)

Same Patch Batch · chainguard-dev · 2026-02-04 · 7 CVEs total

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-2026-25121 7.5 HIGH apko is vulnerable to path traversal in apko dirFS which allows filesystem writes outside
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: melange
Same vendor: chainguard-dev
Same weakness: CWE-22

V. Comments for CVE-2026-24843

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