CVE-2026-90455

Dependency on vulnerable third-party component in Malcolm

Published Sep 11, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Description
A prior update that raised a bundled HTTP client library to a version remediating known vulnerabilities was later reverted, reintroducing the earlier, vulnerable version into a log-processing component. The only code path in that component using the library issues a request to a single fixed, trusted vendor URL at initialization and does not process attacker-controlled input through the library, limiting practical exploitability of the reintroduced version in this context.

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 Dependency on vulnerable third-party component in Malcolm
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Type Values Removed Values Added
Title Reintroduced Vulnerable HTTP Client in Malcolm Log-Processing
Type Values Removed Values Added
Title Reintroduced Vulnerable HTTP Client in Malcolm Log-Processing
Type Values Removed Values Added
Title Legacy HTTP Client Library Reintroduction in Malcolm Log-Processing Component
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 Legacy HTTP Client Library Reintroduction in Malcolm Log-Processing Component
Type Values Removed Values Added
First Time appeared Cisagov
Cisagov malcolm
Vendors & Products Cisagov
Cisagov malcolm
Type Values Removed Values Added
Title Legacy HTTP Client Reintroduced in Malcolm Log-Processing Component
Type Values Removed Values Added
Title Legacy HTTP Client Reintroduced in Malcolm Log-Processing Component
Type Values Removed Values Added
Title Reintroduced Vulnerable HTTP Client Library in Malcolm Log-Processing Component
Type Values Removed Values Added
Title Reintroduced Vulnerable HTTP Client Library in Malcolm Log-Processing Component
Type Values Removed Values Added
Description A prior update that raised a bundled HTTP client library to a version remediating known vulnerabilities was later reverted, reintroducing the earlier, vulnerable version into a log-processing component. The only code path in that component using the library issues a request to a single fixed, trusted vendor URL at initialization and does not process attacker-controlled input through the library, limiting practical exploitability of the reintroduced version in this context.
Weaknesses CWE-1395
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 2, 2026, 8:48 PM
Reserved
Sep 11, 2026, 9:00 PM
Status
Awaiting Analysis
Published
Sep 11, 2026, 10:16 PM
Modified
Oct 2, 2026, 9:16 PM