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fix: reject a verification token that does not match #4083

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fix: reject a verification token that does not match #4083

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9 changes: 6 additions & 3 deletions lib/nextAuthAdapter.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -81,10 +81,13 @@ export default function Adapter() {
},
async useVerificationToken({ identifier, token }) {
const tokenInStore = await (await store).get(identifier);
if (tokenInStore.token === token) {
await (await store).delete(identifier);
// next-auth treats any non null return value as a valid token, so the
// comparison has to decide the return value and not only the deletion.
if (!tokenInStore || tokenInStore.token !== token) {
return null;
}
return tokenInStore ?? null;
await (await store).delete(identifier);
return tokenInStore;
},
};
}