← WebKit Silent-Fix Report — 2026-W22

69ff7c4b91  CreateModelPlayer Uses ASSERT Instead of MESSAGE_CHECK for Duplicate Identifier

severity low class Other confidence 0.40 WebKit ModelProcess IPC
Aleksei Marchenko Fri May 29 01:46:32 2026 -0700 full: 69ff7c4b9138edacf991e467eaec1820d2d075f4 bug report ↗ view on GitHub ↗
Primitive: compromised web process sends duplicate/unknown model player id
Triage note: Converts IPC-triggerable identifier assertions into validated MESSAGE_CHECKs, IPC hardening in the model process.

Security-relevant, below the exploitable-grade bar for a full root-cause writeup. The triage verdict is above; the side-by-side patch is below.

Before / after

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