311625 2026-04-07 00:52:46 -0700 WebAuthn: AbortSignal reason is ignored when rejecting credentials.create() and credentials.get() 2026-04-08 08:48:19 -0700 1 1 1 Unclassified WebKit WebCore Misc. WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 marcosc marcosc webkit-bug-importer oldest_to_newest 2197534 0 marcosc 2026-04-07 00:52:46 -0700 When navigator.credentials.create() or navigator.credentials.get() is called with an AbortSignal and the signal is aborted via controller.abort(reason), the returned promise should reject with signal.reason. Instead, WebKit discards the reason and always rejects with a hard-coded AbortError DOMException. Root cause: AuthenticatorCoordinator.cpp, lines ~251 and ~370: if (abortSignal && abortSignal->aborted()) { promise.reject(Exception { ExceptionCode::AbortError, "Aborted by AbortSignal."_s }); The fix is to reject with abortSignal->reason() instead. Affects both credentials.create() and credentials.get(). 2197535 1 webkit-bug-importer 2026-04-07 00:52:52 -0700 <rdar://problem/174220589> 2197879 2 marcosc 2026-04-07 22:58:32 -0700 Pull request: https://github.com/WebKit/WebKit/pull/62251 2197997 3 ews-feeder 2026-04-08 08:48:17 -0700 Committed 310782@main (7a3f4c0ecbd3): <https://commits.webkit.org/310782@main> Reviewed commits have been landed. Closing PR #62251 and removing active labels.