CVE-2026-90443: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') in CISA Malcolm
A web interface reflects a portion of the request URL into a script context and a hyperlink attribute without adequate encoding, and does not require authentication to reach. This allows an unauthenticated network attacker to craft a link that, when visited by a user, executes arbitrary script in the context of the affected application and can redirect the user's browser to an arbitrary external site. Successful exploitation could allow an attacker to act with the compromised user's session privileges within the application.
AI Analysis
Technical Summary
CVE-2026-90443 is an improper neutralization of input during web page generation (CWE-79) vulnerability in CISA Malcolm. The web interface reflects part of the request URL into a script context and hyperlink attribute without adequate encoding and does not require authentication. This allows unauthenticated network attackers to craft malicious links that execute arbitrary scripts in the context of the affected application and redirect users to arbitrary external sites. Exploitation could allow attackers to perform actions with the compromised user's session privileges.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary scripts in the context of the affected application and redirect users to external sites. This can lead to session hijacking or unauthorized actions performed with the victim user's privileges within the application. The vulnerability impacts user trust and application integrity but does not require prior authentication.
Mitigation Recommendations
No official patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when clicking links related to the affected application. Implementing input validation and output encoding on the affected web interface is recommended once a fix is released.
CVE-2026-90443: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') in CISA Malcolm
Description
A web interface reflects a portion of the request URL into a script context and a hyperlink attribute without adequate encoding, and does not require authentication to reach. This allows an unauthenticated network attacker to craft a link that, when visited by a user, executes arbitrary script in the context of the affected application and can redirect the user's browser to an arbitrary external site. Successful exploitation could allow an attacker to act with the compromised user's session privileges within the application.
CVSS v4.0
Score 5.3medium
Affected software
CISA
Malcolm
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-90443 is an improper neutralization of input during web page generation (CWE-79) vulnerability in CISA Malcolm. The web interface reflects part of the request URL into a script context and hyperlink attribute without adequate encoding and does not require authentication. This allows unauthenticated network attackers to craft malicious links that execute arbitrary scripts in the context of the affected application and redirect users to arbitrary external sites. Exploitation could allow attackers to perform actions with the compromised user's session privileges.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary scripts in the context of the affected application and redirect users to external sites. This can lead to session hijacking or unauthorized actions performed with the victim user's privileges within the application. The vulnerability impacts user trust and application integrity but does not require prior authentication.
Mitigation Recommendations
No official patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when clicking links related to the affected application. Implementing input validation and output encoding on the affected web interface is recommended once a fix is released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- icscert
- Date Reserved
- 2026-09-11T21:00:07.497Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa47a7555bf5e2cf581b1a5
Added to database: 09/11/2026, 22:02:29 UTC
Last enriched: 09/11/2026, 22:17:43 UTC
Last updated: 09/12/2026, 01:09:59 UTC
Views: 5
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