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Advisories

commonmark 2.0.0 before 2.8.4 Denial of Service via XML

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severity
medium
date
Affecting

  • commonmark >= 2.0.0, < 2.8.4

CWE
  • CWE-405 Asymmetric Resource Consumption (Amplification)
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
GrahamCampbell
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.

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