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EUVD-2026-162979

fkie_cve-2024-45607

whatsapp-api-js is a TypeScript server agnostic Whatsapp's Official API framework. It's possible to check the payload validation using the WhatsAppAPI.verifyRequestSignature and expect false when the signature is valid. Incorrect Access Control, anyone using the post or verifyRequestSignature methods to handle messages is impacted. This vulnerability is fixed in 4.0.3.

GHSA-mwhf-vhr5-7j23 — whatsapp-api-js fails to validate message's signature

Affected: npm: whatsapp-api-js

### Impact Incorrect Access Control, anyone using the post or verifyRequestSignature methods to handle messages is impacted.

### Patches Patched in version 4.0.3.

### Workarounds It's possible to check the payload validation using the WhatsAppAPI.verifyRequestSignature and expect false when the signature is valid.

```ts function doPost(payload, header_signature) { if (whatsapp.verifyRequestSignature(payload.toString(), header_signature) { throw 403; } // Now the payload is correctly verified whatsapp.post(payload); } ```

### References https://github.com/Secreto31126/whatsapp-api-js/pull/371