SEPTEMBER 17, 2026
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Case File

CVE-2026-86432

MEDIUM · CVSS 5.3 EPSS 0.25% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-07 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Commonmark versions prior to 2.8.4 are vulnerable to a denial of service attack due to a flaw in the XmlRenderer, which leads to excessive memory consumption when processing deeply nested Markdown or AST structures. This vulnerability can result in significant server resource exhaustion, potentially impacting service availability. Organizations using affected versions should prioritize patching to mitigate the risk of service disruption.

Public Exploit Signal

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

GitHub PoC Links

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

CVE
CVE-2026-86432
Severity
MEDIUM
CVSS
5.3
EPSS
0.25%

Original NVD Description

commonmark versions from 2.0.0 before 2.8.4 contain a denial of service vulnerability in XmlRenderer that emits depth-proportional indentation for every XML tag. Attackers can provide deeply nested Markdown or AST structures to cause quadratic memory consumption and output amplification, exhausting server resources.