CVE-2026-90445

Path Traversal in Malcolm

Published Sep 11, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
An interface that accepts file uploads from authenticated users extracts the contents of uploaded archives without validating that extracted file paths remain within the intended destination directory. This allows an authenticated attacker to craft an archive whose entries traverse outside the destination directory, causing the extraction process to write files to arbitrary locations with the privileges of that process. This could allow an attacker to inject fabricated records into the system's stored data or tamper with application configuration.

Remediation

Vendor Solution

The latest version of Malcolm (September 2026 or later) fixes these vulnerabilities. Affected users are encouraged to update their instance of Malcolm to the latest version.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Path Traversal in Malcolm
References
Metrics cvssV3_1

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

Type Values Removed Values Added
Title Malcolm Archive Extraction Enables Arbitrary File Write by Authenticated Users
Type Values Removed Values Added
Title Malcolm Archive Extraction Enables Arbitrary File Write by Authenticated Users
Type Values Removed Values Added
Title Authenticated Path Traversal via Archive Extraction in Malcolm
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Authenticated Path Traversal via Archive Extraction in Malcolm
Type Values Removed Values Added
Title Authenticated Path Traversal via Archive Extraction in Malcolm
Type Values Removed Values Added
First Time appeared Cisagov
Cisagov malcolm
Vendors & Products Cisagov
Cisagov malcolm
Type Values Removed Values Added
Title Authenticated Path Traversal via Archive Extraction in Malcolm
Type Values Removed Values Added
Title Directory Traversal via Archive Extraction in Malcolm
Type Values Removed Values Added
Title Directory Traversal via Archive Extraction in Malcolm
Type Values Removed Values Added
Title Authenticated Archive Extraction Vulnerability Allows Arbitrary File Writes
Type Values Removed Values Added
Title Authenticated Archive Extraction Vulnerability Allows Arbitrary File Writes
Type Values Removed Values Added
Description An interface that accepts file uploads from authenticated users extracts the contents of uploaded archives without validating that extracted file paths remain within the intended destination directory. This allows an authenticated attacker to craft an archive whose entries traverse outside the destination directory, causing the extraction process to write files to arbitrary locations with the privileges of that process. This could allow an attacker to inject fabricated records into the system's stored data or tamper with application configuration.
Weaknesses CWE-22
References
Metrics cvssV4_0

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 2, 2026, 9:16 PM
Reserved
Sep 11, 2026, 9:00 PM
Status
Awaiting Analysis
Published
Sep 11, 2026, 10:16 PM
Modified
Oct 2, 2026, 10:16 PM