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TI-2026-45070 Aliases CVE-2026-63134

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

Priority MEDIUM 57CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00421 36th percentileScored 2026-11-07
Fix Fixed Malcolm (cisagov): 26.07.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cisagovMalcolmbefore 26.07.026.07.0Patch availableCNA
  • Malcolm Vendorcisagov Affected before 26.07.0 Fixed in 26.07.0 Patch available CNA

Remediation

  • Fix · CNA Malcolm (cisagov) Fixed in 26.07.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63134

References

Other 4

  • TI-2026-45069 Malcolm has Uncontrolled Resource Consumption in Archive Extraction (Inode-Exhaustion DoS) CVSS 4.0HIGH 7.1
  • TI-2026-15970 Improper handling of highly compressed data (data amplification) in CISA Malcolm CVSS 4.0HIGH 7.1
  • TI-2026-15969 Incorrect Authorization in CISA Malcolm CVSS 4.0MEDIUM 5.3
  • TI-2026-40197 Malcolm vulnerable to RCE via unrestricted .php upload to the file-upload component CVSS 4.0HIGH 8.7
  • TI-2026-45083 Malcolm Vulnerable to Authorization Bypass via URI Normalization Differential in Nginx Lua RBAC CVSS 4.0HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences