{"id":"CVE-2026-46654","aliases":["GHSA-vj64-rjf3-w3v7"],"url":"https://o3.security/vulnerability/CVE-2026-46654","summary":"Plonky3 MultiField32Challenger: transcript malleability and challenge entropy loss","details":"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":"2026-06-10T20:06:10.554Z","modified":"2026-08-12T03:51:48.758764247Z","cvss":null,"epss":{"score":0.00108,"percentile":0.01389,"asOf":"2026-08-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"p3-challenger","fixedVersion":"0.4.3"},{"ecosystem":"crates.io","name":"p3-challenger","fixedVersion":"0.5.3"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46654.json"},{"type":"ADVISORY","url":"https://github.com/Plonky3/Plonky3/security/advisories/GHSA-vj64-rjf3-w3v7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46654"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:48.758764247Z"}}