CVE-2026-86435: Inefficient Algorithmic Complexity

commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Footnote extension that fails to deduplicate footnote definitions. Attackers can craft documents with duplicate footnote definitions and references to create quadratic output expansion, consuming excessiv...

CVE-2026-83612: Improper Handling of Case Sensitivity

xmldom is a pure JavaScript W3C standard-based XML DOM Level 2 Core DOMParser and XMLSerializer module. From 0.9.0-beta.1 until 0.9.12, HTML-mode parsing through DOMParser.parseFromString mishandles a mixed-case closing tag for the script, style, textarea, or title raw-text elements...

PT-2026-84276

Name of the Vulnerable Software and Affected Versions xmldom versions 0.9.0-beta.1 through 0.9.11 Description HTML-mode parsing through the DOMParser.parseFromString function mishandles mixed-case closing tags for raw-text elements such as script, style, textarea, or title. The...

GHSA-MJ63-M3RC-8PPR league/commonmark: Denial of service via deeply nested XML output

Impact XmlRenderer pretty-prints XML by emitting depth-proportional indentation whitespace for every opening and closing tag. For a tree of depth n, the indentation alone sums to On² bytes of output and corresponding memory, reachable through MarkdownToXmlConverter — e.g. strrepeat' ', $depth...

GHSA-MMG9-6M6J-JQQX LiquidJS Has Memory Limit Bypass via Quadratic Amplification in `replace` Filter

Summary The replace filter in LiquidJS incorrectly accounts for memory usage when the memoryLimit option is enabled. It charges str.length + pattern.length + replacement.length bytes to the memory limiter, but the actual output from str.splitpattern.joinreplacement can be quadratically larger whe...