PT-2026-42645

Impact - Key: challenger/src/multi field challenger.rs | MultiField32Challenger::duplexing | transcript malleability - Affected files: challenger/src/multi field challenger.rs, field/src/helpers.rs - Violated invariant: The Fiat-Shamir sponge must bind challenges to the exact sequence of observed...

PT-2026-42695

Name of the Vulnerable Software and Affected Versions Plonky3 versions prior to 0.4.3 Plonky3 versions prior to 0.5.3 Description An attacker controlling prover-side observations can craft distinct transcripts that produce identical challenges, breaking the binding property of Fiat-Shamir. This...