CVE-2026-48100 Payy: agg_agg trailing message slots are unconstrained and allow forged burn messages

Payy is an Ethereum L2 zk-rollup for privacy preserving and regulatory compliant transactions. Prior to version 1.3.0, aggagg forwards the compacted message stream from its inner proofs into a public messages: Field; 1000 array, but it never checks that the unused tail of the outer array is zero....