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CVE-2026-63133

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

CVSS 3.1 6.5 MEDIUMCVSS 4.0 7.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-63133

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-63133

Published

Malcolm

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "cisagov",
                    "product": "Malcolm",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "< 26.07.0"
                        },
                        {
                            "status": "unaffected",
                            "version": "26.07.0"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON