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Zeroize transient Web Crypto JWK material - #628
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This was referenced Sep 19, 2026
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Fixes #627. Parent #102 remains open for unchanged packaged MCP and connection-secret persistence/reopen acceptance.
This hardens existing Web Crypto JWK handling by zeroizing malformed decoded prefixes and transient Base64URL import/export strings, applying AES/HMAC size limits before native UTF-8 allocation, and updating the provider and capability documentation. It does not change the exposed algorithm set.
Validation:
git diff --checkonly, per the current fast implementation directive.