On Safari Technology Preview Release 151 (Safari 16.0, WebKit 18615.1.1.2) on macOS 13 beta 5 the conditional UI (https://github.com/w3c/webauthn/wiki/Explainer:-WebAuthn-Conditional-UI) functionality for Passkeys does not set the user verified flag in the authenticationData of the response. Reproducing Steps: 1. Webpage with <input autocomplete="webauthn"/ > 2. Perform webauthn get with a conditional mediation: navigator.credentials.get({ mediation: 'conditional', publicKey: { challenge: <challengeFromServer>, rpId: <rpId>, userVerification: "required" } }).then(({id, type, response, authenticatorAttachment}) => { console.log(response.authenticatorData); }); 3. Click into the input box - note that the conditional UI appears. 4. Complete the authentication with a registered credential. 5. decode the response.authenticatorData field and note the uv flag is not set. Example flags: flags: { up: true, uv: false, be: true, bs: true, at: false, ed: false, flagsInt: 25 } When invoking the navigator.credentials.get request manually (without conditional mediation) and using the exact same public key request options and the same credentials, the user verified flag is set.