PT-2026-6469 · Go · Chainguard.Dev/Melange

Published 2026-02-03 · Updated 2026-02-03

OSV

CVSS v3.1

8.2

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H

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.

Fix: Fixed in 6e243d0d. Merged in release.

Acknowledgements

melange thanks Oleh Konko from 1seal for discovering and reporting this issue.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

GHSA-QXX2-7H4C-83F4

Affected Products

Chainguard.Dev/Melange

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-24843 · Security Note
• https://osv.dev/vulnerability/GHSA-qxx2-7h4c-83f4 · Vendor Advisory
• https://github.com/chainguard-dev/melange · Note
• https://github.com/chainguard-dev/melange/security/advisories/GHSA-qxx2-7h4c-83f4 · Note
• https://github.com/chainguard-dev/melange/commit/6e243d0d46699f837d7c392397a694d2bcc7612b · Note