td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode

Impact A remote, unauthenticated attacker can cause excessive memory allocation and resulting CPU / GC pressure, potentially OOM termination by sending a crafted unencrypted MTProto packet. proto.UnencryptedMessage.Decode read an attacker-controlled 32-bit dataLen field and immediately allocated ...

EUVD-2026-50085

gotd/td is a T Telegram MTProto API client in Go. Prior to 0.145.1, proto.UnencryptedMessage.Decode in proto/unencryptedmessage.go read attacker controlled dataLen from an unauthenticated MTProto unencrypted packet and allocated makebyte, dataLen before checking the remaining buffer, allowing...