EUVD-2026-39565

HMAC zero-length tag forgery in EVPDigestVerifyFinal, where a zero-length tag could be accepted as valid during HMAC verification. In the OpenSSL-compatibility HMAC verify path the supplied signature length was only checked as not exceeding the MAC length, so a zero-length or otherwise truncated...

Improper Verification Of Cryptographic Signature

Clerk is vulnerable to improper verification of cryptographic signature. The vulnerability is due to the use of the verifyWebhook helper, which may accept improperly signed webhook events, allowing an attacker to forge webhook requests and potentially trigger unauthorized actions...

CVE-2019-5431

This vulnerability was caused by an incomplete fix to CVE-2017-0911. Twitter Kit for iOS versions 3.0 to 3.4.0 is vulnerable to a callback verification flaw in the "Login with Twitter" component allowing an attacker to provide alternate credentials. In the final step of "Login with Twitter"...