CVE-2026-46654

Name: CVE-2026-46654
Creator: NVD / NIST
Published: 2026-06-10T22:16:59.757+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.9/10EPSS 0.11%

Last modified Jun 17, 2026

CVE-2026-46654 is a high-severity vulnerability rated 8.9/10 on the CVSS scale. 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. EPSS estimates a 0.11% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0

8.9/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.11%

1.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

References

https://github.com/Plonky3/Plonky3/security/advisories/GHSA-vj64-rjf3-w3v7

Timeline

Published: Jun 10, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-46654?

How severe is CVE-2026-46654?

CVE-2026-46654 has a CVSS score of 8.9/10 (HIGH severity). The EPSS model estimates a 0.11% probability of exploitation in the next 30 days.

How do I fix CVE-2026-46654?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-46654?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST