CVE-2026-46654 — Plonky3 MultiField32Challenger: transcript malleability and challenge entropy loss
Plonky3 is a toolkit for polynomial IOPs (PIOPs). Prior to versions 0.4.3 and 0.5.3, an attacker controlling prover-side observations can craft distinct transcripts that produce…
Published: 2026-06-10 · CVSS: 8.9 · CVSS 4.0
Plonky3 is a toolkit for polynomial IOPs (PIOPs). Prior to versions 0.4.3 and 0.5.3, an attacker controlling prover-side observations can craft distinct transcripts that produce identical challenges, breaking the binding property of Fiat-Shamir. This issue has been patched in versions 0.4.3 and 0.5.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7