CVE
CVE-2026-24843
melange QEMU runner could write files outside workspace directory
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.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
C
H
U
8.2
-
3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
Related Resources
No items found.
References
https://github.com/chainguard-dev/melange/security/advisories/GHSA-qxx2-7h4c-83f4, https://nvd.nist.gov/vuln/detail/CVE-2026-24843, https://github.com/chainguard-dev/melange/commit/6e243d0d46699f837d7c392397a694d2bcc7612b, https://github.com/chainguard-dev/melange
Basic Information
Ecosystem
