SEPTEMBER 19, 2026
Live Feed
Back to database
Case File

CVE-2026-66921

MEDIUM · CVSS 6.3 EPSS 0.28% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-28 · Last synced 2026-08-27

CyberRota Analysis

AI-Generated

The vulnerability affects Pivotick’s Markdown node-reference renderer in Java, which fails to properly HTML-escape user-controlled node names, allowing attackers to inject arbitrary HTML and JavaScript into rendered content. This can lead to cross-site scripting (XSS) attacks, enabling unauthorized access to same-origin information or manipulation of displayed content when a victim interacts with a crafted graph or note. Organizations using this renderer should prioritize patching to mitigate potential exploitation risks in their applications.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit
GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-66921
Severity
MEDIUM
CVSS
6.3
EPSS
0.28%
Java

Original NVD Description

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.