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🔒 replace insecure Math.random with crypto.getRandomValues for UUID generation - #143

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jules-fix-insecure-random-uuid-9417972830518485790
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🔒 replace insecure Math.random with crypto.getRandomValues for UUID generation#143
MarsLuay wants to merge 1 commit into
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jules-fix-insecure-random-uuid-9417972830518485790

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@MarsLuay

@MarsLuay MarsLuay commented Sep 6, 2026

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🎯 What: The Math.random() call used for fallback UUID generation in fallbackUuid in src/ShapeClipboard.ts has been replaced with a cryptographically secure equivalent via crypto.getRandomValues().
⚠️ Risk: The previous reliance on Math.random() exposed an Insecure Randomness vulnerability. Since Math.random() does not provide true cryptographic randomness, generated UUIDs could theoretically be predictable or lead to collisions, posing a risk when reliable uniqueness is essential (e.g., across collaborations or syncing).
🛡️ Solution: The UUID generation now passes down the crypto API properly (prioritizing the Obsidian window's secure engine, then the generic DOM window, and optionally globalThis.crypto for headless environments). It securely instantiates an array and derives unbiased pseudorandom bytes. Math.random() is retained explicitly only as an absolute last resort when crypto is undefined so uniqueness guarantees gracefully degrade rather than silently failing to zero arrays.


PR created automatically by Jules for task 9417972830518485790 started by @MarsLuay

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👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

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Copilot AI lite review requested due to automatic review settings September 6, 2026 04:51

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2 participants