* [WEB-7888] fix(security): normalize href before protocol check in CustomLinkExtension (GHSA-v2vv-7wq3-8w2j)
The existing startsWith("javascript:") guard in parseHTML() and renderHTML()
is bypassable with a whitespace prefix (e.g. "\tjavascript:alert(1)"). Per the
WHATWG URL spec, browsers strip ASCII Tab/LF/CR from URL strings during parsing,
so the whitespace-prefixed href passes the guard, is rendered into the DOM
verbatim, and executes when clicked (browser strips the tab → javascript: fires).
Add isDangerousHref() helper that strips Tab/LF/CR and leading C0 controls
before the protocol check, replicating the browser's normalization. Replace
both naive startsWith checks in parseHTML() and renderHTML() with this helper.
Add a defence-in-depth guard in clickHandler.ts that rejects
javascript:/data:/vbscript: hrefs before window.open() — link.href is the
browser-resolved URL (whitespace already stripped), so a regex check there
catches any URI that bypasses the parse/render-time guards.
Co-authored-by: Plane AI <noreply@plane.so>
* [WEB-7888] fix: align clickHandler blocked-scheme list with isValidHttpUrl policy
Add file: and about: to the clickHandler protocol guard to match the
blocked-scheme contract in isValidHttpUrl, avoiding policy drift.
Co-authored-by: Plane AI <noreply@plane.so>
---------
Co-authored-by: Plane AI <noreply@plane.so>
Modern project management for all teams
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Meet Plane, an open-source project management tool to track issues, run sprints cycles, and manage product roadmaps without the chaos of managing the tool itself. 🧘♀️
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