Pivotick up to 1.4.0 Markdown node-reference renderer nodeName cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in Pivotick up to 1.4.0. Affected by this issue is some unknown functionality of the component Markdown node-reference renderer. The manipulation of the argument nodeName leads to cross site scripting. This vulnerability is traded as CVE-2026-66921. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Pivotick up to 1.4.0. This issue affects some unknown processing of the component Markdown node-reference renderer. The manipulation of the argument nodeName with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Pivotick’s Markdown node-reference renderer failed to HTML-escape the attacker-controlled nodeName value before interpolating it into both the data-node-name attribute and the body of a generated <span> element. Because the node-reference tokenizer rejected only square brackets, a crafted node name could still contain quotation marks, angle brackets, or other HTML metacharacters. An attacker could therefore terminate the quoted attribute or inject additional HTML elements and event-handler attributes. When malicious node-reference content is rendered by a consumer that does not apply DOMPurify or equivalent sanitization, arbitrary JavaScript may execute in the victim’s browser in the security context of the application. Successful exploitation requires a victim to open or render a crafted graph or note and could allow the attacker to access same-origin information, modify displayed content, or perform actions using the victim’s session. The patch resolves the issue by applying context-appropriate HTML escaping to node names before inserting them into either HTML text or quoted attribute values. The shared escaping function now encodes ampersands, angle brackets, and both types of quotation marks.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-66921 since 07/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Applying the patch 4c13ff2b0ec769881b5526feddef37c0c5a08885 is able to eliminate this problem.

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Productinfo

Name

• Pivotick

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4.0

Website

• Product: https://github.com/Pivotick/Pivotick/

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