CISA Malcolm

View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to cause a denial-of-service condition or execute arbitrary code. The following versions of CISA Malcolm are affected: Malcolm <26.06.1 (CVE-2026-55676) Malcolm <26.07.0 (CVE-2026-63133, CVE-2026-63134, CVE-2026-63177) Malcolm <=26.07.1 (CVE-2026-19670, CVE-2026-19671) CVSS Vendor Equipment Vulnerabilities v3 8.8 CISA CISA Malcolm Allocation of Resources Without Limits or Throttling, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Unrestricted Upload of File with Dangerous Type, Incorrect Authorization, Improper Handling of Highly Compressed Data (Data Amplification) Background Critical Infrastructure Sectors: Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-63133 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. View CVE Details Affected Products CISA Malcolm Vendor: CISA Product Version: CISA Malcolm: <26.07.0 Product Status: known_affected Remediations Vendor fix Malcolm version 26.07.0 addresses these issues. For more information, see https://github.com/cisagov/Malcolm/pull/1043. (CVE-2026-63133, CVE-2026-63134, CVE-2026-63177) https://github.com/cisagov/Malcolm/pull/1043 Relevant CWE: CWE-770 Allocation of Resources Without Limits or Throttling Metrics CVSS Version Base Score Base Severity Vector String 3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H 4.0 7.1 HIGH 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 CVE-2026-63134 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. View CVE Details Affected Products CISA Malcolm Vendor: CISA Product Version: CISA Malcolm: <26.07.0 Product Status: known_affected Remediations Vendor fix Malcolm version 26.07.0 addresses these issues. For more information, see https://github.com/cisagov/Malcolm/pull/1043. (CVE-2026-63133, CVE-2026-63134, CVE-2026-63177) https://github.com/cisagov/Malcolm/pull/1043 Relevant CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.4 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L 4.0 5.3 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVE-2026-55676 Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at POST /server/php/submit.php and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restrict accepted file types is an empty array by default (file-upload/php/config.php:16), so the type check is a no-op and every extension is accepted. The filename sanitizer keeps the .php extension intact. Committed files land in /var/www/upload/server/php/files (file-upload/php/config.php:7), and the component's nginx routes any URL ending in .php to php-fpm. An authenticated GET /server/php/files/.php then executes the uploaded code as www-data. Prior to version 26.0