AUGUST 24, 2026
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Case File

CVE-2026-59930

MEDIUM · CVSS 4.3 EPSS 0.14% Public Exploit

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

CyberRota Analysis

AI-Generated

The vulnerability affects the Mistune Markdown parser in Java, specifically in versions prior to 3.3.0, where the toc plugin generates predictable heading IDs. This allows attackers to manipulate id attributes, potentially leading to redirection issues in same-page navigation and interference with CSS selectors or JavaScript handlers. Developers and organizations using Mistune should prioritize upgrading to version 3.3.0 to mitigate these risks.

Public Exploit Signal

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

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CVE
CVE-2026-59930
Severity
MEDIUM
CVSS
4.3
EPSS
0.14%
Java

Original NVD Description

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the toc plugin and TableOfContents directive generate heading IDs as predictable toc_N values without slugifying the heading text, allowing attacker-controlled id="toc_N" content to collide with generated anchors and redirect same-page navigation, CSS selectors, or JavaScript handlers. This issue is fixed in version 3.3.0.

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