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CVE-2026-90457: CWE-916 Use of password hash with insufficient computational effort in CISA Malcolm

0
Medium
VulnerabilityCVE-2026-90457cvecve-2026-90457cwe-916
Published: 09/11/2026 (09/11/2026, 21:52:36 UTC)
Source: CVE Database V5
Vendor/Project: CISA
Product: Malcolm

Description

The administrative password is hashed using a comparatively weak, fast algorithm for the credential store backing one authentication path, and the file containing that hash is written with permissions allowing it to be read by any local user. This is inconsistent with a separate, stronger hashing algorithm used for the same password on another authentication path. A party able to read this file, including a local user or a party with access to a configuration backup, could feasibly recover the underlying password through offline computation, compromising the administrative credential across every path that accepts it.

CVSS v4.0

Score 6.9medium

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Affected software

CISA

Malcolm

Affected versions
>=0 <26.06.0
GitHub Actionsmore threats →cve
Malcolm
pkg:github/Malcolm
Affected versions
>=0 <26.06.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/11/2026, 22:17:50 UTC

Technical Analysis

The vulnerability arises because the administrative password in CISA Malcolm is stored using a comparatively weak and fast hashing algorithm in one credential store, and the file containing this hash is accessible to any local user due to permissive file permissions. This is inconsistent with a stronger hashing algorithm used for the same password on another authentication path. An adversary able to read this hash file, including local users or those with access to configuration backups, could perform offline computations to recover the underlying password, thereby compromising administrative credentials across all authentication paths that accept this password.

Potential Impact

An attacker with local system access or access to configuration backups can obtain the weakly hashed password file and potentially recover the administrative password through offline attacks. This compromises administrative credentials across all authentication paths that accept the password, potentially allowing unauthorized administrative access.

Mitigation Recommendations

No patch or official fix is currently documented for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict local file access permissions to prevent unauthorized reading of the password hash file and secure configuration backups to limit exposure.

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Technical Details

Data Version
5.2
Assigner Short Name
icscert
Date Reserved
2026-09-11T21:00:09.301Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 6aa47a7455bf5e2cf581b1a4

Added to database: 09/11/2026, 22:02:28 UTC

Last enriched: 09/11/2026, 22:17:50 UTC

Last updated: 09/11/2026, 22:56:33 UTC

Views: 4

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