NuytsTech Security

CVE-2026-41305

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PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Versions prior to 8.5.10 do not escape `

` sequences when stringifying CSS ASTs. When user-submitted CSS is parsed and re-stringified for embedding in HTML `

` in CSS values breaks out of the style context, enabling XSS. Version 8.5.10 fixes the issue.

More information : https://github.com/postcss/postcss/releases/tag/8.5.10

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