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Description

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.

PUBLISHED Reserved 2026-05-15 | Published 2026-06-10 | Updated 2026-06-10 | Assigner GitHub_M




HIGH: 8.9CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

Problem types

CWE-1240: Use of a Cryptographic Primitive with a Risky Implementation

CWE-345: Insufficient Verification of Data Authenticity

Product status

< 0.4.3
affected

>= 0.5.0, < 0.5.3
affected

References

github.com/...lonky3/security/advisories/GHSA-vj64-rjf3-w3v7

cve.org (CVE-2026-46654)

nvd.nist.gov (CVE-2026-46654)

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