CVE-2026-32129 Poseidon V1 variable-length input collision via implicit zero-padding

soroban-poseidon provides Poseidon and Poseidon2 cryptographic hash functions for Soroban smart contracts. Poseidon V1 PoseidonSponge accepts variable-length inputs without injective padding. When a caller provides fewer inputs than the sponge rate inputs.len k, hashm1, ..., mk equals hashm1, ......

CVE-2026-32129

The CVE-2026-32129 entry concerns soroban-poseidon PoseidonSponge (Poseidon V1) used in Soroban smart contracts. It states that PoseidonSponge accepts variable-length inputs without injective padding, and when inputs.len() k yields the same pre-permutation state as hashing [m1,...,mk,0], making ...

CVE-2026-32129 Poseidon V1 variable-length input collision via implicit zero-padding

soroban-poseidon provides Poseidon and Poseidon2 cryptographic hash functions for Soroban smart contracts. Poseidon V1 PoseidonSponge accepts variable-length inputs without injective padding. When a caller provides fewer inputs than the sponge rate inputs.len k, hashm1, ..., mk equals hashm1, ......