What’s Vulnerable › Vulnerabilities

CVE-2026-63134: Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-24
• Weakness: CWE-22

Description

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.

Affected products

• cisagov Malcolm: before 26.07.0

References

• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-230-01.json
• https://github.com/cisagov/Malcolm/releases/tag/v26.07.0
• https://github.com/cisagov/Malcolm/security/advisories/GHSA-65mm-vgrw-vqx4
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01
• https://github.com/cisagov/Malcolm/security/advisories/GHSA-65mm-vgrw-vqx4

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