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1 vulnerability by Plonky3

CVE-2026-46654 (GCVE-0-2026-46654)

Vulnerability from cvelistv5 – Published: 2026-06-10 20:06 – Updated: 2026-06-11 14:01
VLAI
Title
Plonky3 MultiField32Challenger: transcript malleability and challenge entropy loss
Summary
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.
Severity
8.9 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-1240 - Use of a Cryptographic Primitive with a Risky Implementation
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
Impacted products
Vendor Product Version
Plonky3 Plonky3 Affected: < 0.4.3
Affected: >= 0.5.0, < 0.5.3
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