CVE-2026-90448: CWE-862 Missing authorization in CISA Malcolm
A deployment mode intended to expose only read access to stored data proxies a set of application programming interface routes without restricting which request methods are allowed. One such route accepts a request that creates or overwrites a stored record, including an attacker-chosen identifier, using the application's own elevated backend credentials. This allows an authenticated user on a deployment intended to be read-only to forge or overwrite stored records that should not be modifiable in that deployment mode.
AI Analysis
Technical Summary
The vulnerability arises because a read-only deployment mode of CISA Malcolm proxies API routes without properly restricting allowed HTTP request methods. One such route accepts requests that create or overwrite stored records, including attacker-chosen identifiers, leveraging the application's elevated backend credentials. Consequently, an authenticated user can forge or overwrite data that should be immutable in this deployment mode, constituting a missing authorization control (CWE-862).
Potential Impact
An authenticated user in a deployment mode intended to be read-only can modify or forge stored records, potentially compromising data integrity and violating access control policies. This could lead to unauthorized data manipulation despite the deployment's read-only intent.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated users carefully and consider disabling or limiting API routes that allow data modification in read-only deployments.
CVE-2026-90448: CWE-862 Missing authorization in CISA Malcolm
Description
A deployment mode intended to expose only read access to stored data proxies a set of application programming interface routes without restricting which request methods are allowed. One such route accepts a request that creates or overwrites a stored record, including an attacker-chosen identifier, using the application's own elevated backend credentials. This allows an authenticated user on a deployment intended to be read-only to forge or overwrite stored records that should not be modifiable in that deployment mode.
CVSS v4.0
Score 7.1high
Affected software
CISA
Malcolm
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises because a read-only deployment mode of CISA Malcolm proxies API routes without properly restricting allowed HTTP request methods. One such route accepts requests that create or overwrite stored records, including attacker-chosen identifiers, leveraging the application's elevated backend credentials. Consequently, an authenticated user can forge or overwrite data that should be immutable in this deployment mode, constituting a missing authorization control (CWE-862).
Potential Impact
An authenticated user in a deployment mode intended to be read-only can modify or forge stored records, potentially compromising data integrity and violating access control policies. This could lead to unauthorized data manipulation despite the deployment's read-only intent.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated users carefully and consider disabling or limiting API routes that allow data modification in read-only deployments.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- icscert
- Date Reserved
- 2026-09-11T21:00:09.300Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa47a7955bf5e2cf581b36a
Added to database: 09/11/2026, 22:02:33 UTC
Last enriched: 09/11/2026, 22:16:34 UTC
Last updated: 09/11/2026, 22:23:22 UTC
Views: 4
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