CVE-2026-63133

Malcolm has Uncontrolled Resource Consumption in Archive Extraction (Inode-Exhaustion DoS)

Published Aug 11, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue.

Remediation

Vendor Solution

Malcolm version 26.07.0 addresses these issues. For more information, see  https://github.com/cisagov/Malcolm/pull/1043

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Type Values Removed Values Added
First Time appeared Cisagov
Cisagov malcolm
Vendors & Products Cisagov
Cisagov malcolm
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue.
Title Malcolm has Uncontrolled Resource Consumption in Archive Extraction (Inode-Exhaustion DoS)
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 2, 2026, 8:15 PM
Reserved
Jul 15, 2026, 4:54 PM
Status
Deferred
Published
Aug 11, 2026, 9:17 PM
Modified
Oct 24, 2026, 4:10 PM