PRoot-Distro has Path Traversal in proot-distro copy — Arbitrary Read, Write, and Persistent Code Execution Outside Container Rootfs

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.6 · CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

<html<head</head<body<h1Path Traversal in <codeproot-distro copy</code — Arbitrary Read, Write, and Persistent Code Execution Outside Container Rootfs</h1 <h2Repository</h2 <phttps://github.com/termux/proot-distro</p <p<strongMaintainer:</strong @sylirre</p <hr <h2Affected Component</h2 <ul <li<strongPackage:</strong proot-distro</li <li<strongAffected command:</strong <codecopy</code</li <li<strongAttack surface:</strong Host-side Termux CLI — this is not a guest distro shell issue</li <li<strongVulnerability type:</strong Path Traversal (CWE-22)</li </ul <hr <h2Affected Versions</h2 Component | Version -- | -- proot-distro | 4.38.0 (initially discovered), 5.0.2 (confirmed still affected — tested on 2026-05-19) Test distro | Ubuntu 25.10 "Questing Quokka" (ubuntu alias) Architecture | aarch64 Device | Samsung A23 Package source | https://packages-cf.termux.dev/apt/termux-main stable/main aarch64 <hr <h2Proof of Concept</h2 <pAll tests were performed using only self-owned files and…

Published by the source

17 Jul 2026, 20:25 UTC

Last modified by the source

17 Jul 2026, 20:30 UTC

Source last checked

26 Oct 2026, 13:49 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-mfr4-mq8w-vmg6

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-mfr4-mq8w-vmg6

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-mfr4-mq8w-vmg6

Advisory: PRoot-Distro has Path Traversal in proot-distro copy — Arbitrary Read, Write, and Persistent Code Execution Outside Container Rootfs
IDs: GHSA-mfr4-mq8w-vmg6
Record: https://patchnext.com/advisories/ghsa-mfr4-mq8w-vmg6 (revision 2, source checked 26 Oct 2026, 13:49 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: proot-distro 5.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI proot-distro: affected < 5.1.0; fixed in 5.1.0

## Suggested inspection (read-only)
- `python -m pip show proot-distro`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on proot-distro.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-mfr4-mq8w-vmg6 (OSV record GHSA-mfr4-mq8w-vmg6 lists affected ranges: PyPI proot-distro >=0 <5.1.0 (fixed))
- Verified: https://github.com/advisories/GHSA-mfr4-mq8w-vmg6 (GitHub-reviewed advisory GHSA-mfr4-mq8w-vmg6 lists affected ranges: PyPI proot-distro >=0 <5.1.0)

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