CVE-2026-63134 PUBLISHED

Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation

Assigner: GitHub_M
Reserved: 15.07.2026 Published: 11.08.2026 Updated: 11.08.2026

Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, safe-extract.py protects file extraction with libarchive's secure flags, but creates directory entries with a raw os.makedirs(os.path.join(dest, entry.pathname)) that has no traversal protection. An uploaded malicious archive containing a directory entry with a ../ sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS Score: 5.4

Product Status

Vendor cisagov
Product Malcolm
Versions
  • Version < 26.07.0 is affected

References

Problem Types

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE