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: 2026-06-10
Score: 8.9 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vj64-rjf3-w3v7 Plonky3 MultiField32Challenger: transcript malleability and challenge entropy loss
History

Thu, 11 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 11 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Plonky3
Plonky3 plonky3
Vendors & Products Plonky3
Plonky3 plonky3

Wed, 10 Jun 2026 21:00:00 +0000

Type Values Removed Values Added
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.
Title Plonky3 MultiField32Challenger: transcript malleability and challenge entropy loss
Weaknesses CWE-1240
CWE-345
References
Metrics cvssV4_0

{'score': 8.9, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-11T14:01:57.462Z

Reserved: 2026-05-15T20:11:54.585Z

Link: CVE-2026-46654

cve-icon Vulnrichment

Updated: 2026-06-11T14:01:42.457Z

cve-icon NVD

Status : Deferred

Published: 2026-06-10T22:16:59.757

Modified: 2026-06-11T15:36:44.723

Link: CVE-2026-46654

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-11T10:40:57Z

Weaknesses