An example environment-configuration file ships with a fixed, publicly-known secret value used to sign authentication cookies for a bundled packet-analysis component. A deployment that copies this example file into active configuration without running the setup routine that regenerates the value will use the known default, allowing an attacker aware of the default to forge valid authentication cookies for that component.

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Advisories

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Fixes

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.


Workaround

No workaround given by the vendor.

History

Tue, 15 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Title Default Authentication Cookie Secret Enables Token Forgery in Packet-Analysis Component

Tue, 15 Sep 2026 05:45:00 +0000

Type Values Removed Values Added
Title Fixed Secret in Example Configuration Enables Authentication Cookie Forgery for Packet‑Analysis Component

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Title Fixed Secret in Example Configuration Enables Authentication Cookie Forgery for Packet‑Analysis Component

Mon, 14 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Mon, 14 Sep 2026 01:15:00 +0000

Type Values Removed Values Added
Title Malcolm Default Cookie Signing Secret Allows Authentication Forgery

Sun, 13 Sep 2026 19:30:00 +0000

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

Sun, 13 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Title Malcolm Default Cookie Signing Secret Allows Authentication Forgery

Sun, 13 Sep 2026 07:30:00 +0000

Type Values Removed Values Added
Title Default Cookie Signing Secret Allows Authentication Cookie Forgery

Sun, 13 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Title Default Cookie Signing Secret Allows Authentication Cookie Forgery

Sat, 12 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Title Default Secret Signing Key Lured into Production Enables Cookie Forgery

Sat, 12 Sep 2026 09:00:00 +0000

Type Values Removed Values Added
Title Default Secret Signing Key Lured into Production Enables Cookie Forgery

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description An example environment-configuration file ships with a fixed, publicly-known secret value used to sign authentication cookies for a bundled packet-analysis component. A deployment that copies this example file into active configuration without running the setup routine that regenerates the value will use the known default, allowing an attacker aware of the default to forge valid authentication cookies for that component.
Weaknesses CWE-1392
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: icscert

Published:

Updated: 2026-09-14T13:00:30.804Z

Reserved: 2026-09-11T21:00:09.301Z

Link: CVE-2026-90451

cve-icon Vulnrichment

Updated: 2026-09-14T12:57:26.610Z

cve-icon NVD

Status : Received

Published: 2026-09-11T22:16:47.343

Modified: 2026-09-14T13:19:28.710

Link: CVE-2026-90451

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T20:30:10Z

Weaknesses