Sanitize HTML rendering in RichText and harden localStorage parsing#33
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Sanitize HTML rendering in RichText and harden localStorage parsing#33
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- Add DOMPurify to sanitize innerHTML and dangerouslySetInnerHTML in RichText.jsx - Add ALLOWED_TAGS allowlist for dynamic tag name rendering in RichText.jsx - Add type validation for localStorage parsed values in useLocalStorage.js Co-authored-by: flexseth <3792502+flexseth@users.noreply.github.com>
Co-authored-by: flexseth <3792502+flexseth@users.noreply.github.com>
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Sanitize HTML rendering in RichText and harden localStorage parsing
Mar 6, 2026
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Security audit of
src/surfaced XSS vectors inRichText.jsxand weak input validation inuseLocalStorage.js.RichText.jsx — XSS prevention
DOMPurify.sanitize()beforeinnerHTMLassignment anddangerouslySetInnerHTMLALLOWED_TAGSallowlist for the dynamictagNameprop to prevent rendering of arbitrary elementsuseLocalStorage.js — type validation
JSON.parseoutput against expected type before returning, includingArray.isArray()discrimination to catch object/array/null confusion from tampered storageDependency
dompurify@3.3.2(no known advisories)✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.