CVE-2026-46654
High
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.
SeverityHigh
CVSS8.9
Exploit probability—
ProductPlonky3
PublishedJun 10, 2026
First seenJun 10, 2026
Weakness typeCWE-1240CWE-1240CWE-345CWE-345
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Plonky3 Plonky3 | < 0.4.3, >= 0.5.0, < 0.5.3 | — |
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