CVE Catalog

CVE-2026-46654

HighCVSS 8.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.11%

1th percentile - higher than 1% of all known CVEs

Summary

Plonky3 prior to versions 0.4.3 and 0.5.3 contains a vulnerability where an attacker controlling prover-side observations can craft distinct transcripts that produce identical challenges, breaking the binding property of Fiat-Shamir.

Risk Assessment

An attacker can forge cryptographic proofs, compromising the integrity of systems relying on Plonky3.

Recommendation

Update Plonky3 to version 0.4.3 or 0.5.3.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS