{"id":"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.","aliases":["GHSA-vj64-rjf3-w3v7"],"modified":"2026-07-08T08:14:18.998358296Z","published":"2026-06-10T20:06:10.554Z","database_specific":{"cwe_ids":["CWE-1240","CWE-345"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46654.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/plonky3/plonky3","events":[{"introduced":"0"},{"fixed":"36829360ee8a04ab0a76f84f60710fc5bd66567c"},{"introduced":"af2a6a755f4e8584e26bcea31b7ab6174b935153"},{"fixed":"cf8b088497b87ff83cd1d80349e8bba370907c03"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"0.4.3"},{"introduced":"0.5.0"},{"fixed":"0.5.3"}]}}],"versions":["v0.5.2","p3-util-v0.5.2","p3-uni-stark-v0.5.2","p3-symmetric-v0.5.2","p3-sha256-v0.5.2","p3-rescue-v0.5.2","p3-poseidon2-v0.5.2","p3-poseidon2-air-v0.5.2","p3-poseidon1-v0.5.2","p3-poseidon1-air-v0.5.2","p3-multilinear-util-v0.5.2","p3-monty-31-v0.5.2","p3-monolith-v0.5.2","p3-mersenne-31-v0.5.2","p3-merkle-tree-v0.5.2","p3-mds-v0.5.2","p3-maybe-rayon-v0.5.2","p3-matrix-v0.5.2","p3-lookup-v0.5.2","p3-koala-bear-v0.5.2","p3-keccak-v0.5.2","p3-keccak-air-v0.5.2","p3-interpolation-v0.5.2","p3-goldilocks-v0.5.2","p3-fri-v0.5.2","p3-field-v0.5.2","p3-field-testing-v0.5.2","p3-dft-v0.5.2","p3-commit-v0.5.2","p3-circle-v0.5.2","p3-challenger-v0.5.2","p3-bn254-v0.5.2","p3-blake3-v0.5.2","p3-blake3-air-v0.5.2","p3-batch-stark-v0.5.2","p3-baby-bear-v0.5.2","p3-air-v0.5.2","v0.5.1","p3-util-v0.5.1","p3-uni-stark-v0.5.1","p3-symmetric-v0.5.1","p3-sha256-v0.5.1","p3-rescue-v0.5.1","p3-poseidon2-v0.5.1","p3-poseidon2-air-v0.5.1","p3-multilinear-util-v0.5.1","p3-monty-31-v0.5.1","p3-monolith-v0.5.1","p3-mersenne-31-v0.5.1","p3-merkle-tree-v0.5.1","p3-mds-v0.5.1","p3-maybe-rayon-v0.5.1","p3-matrix-v0.5.1","p3-lookup-v0.5.1","p3-koala-bear-v0.5.1","p3-keccak-v0.5.1","p3-keccak-air-v0.5.1","p3-interpolation-v0.5.1","p3-goldilocks-v0.5.1","p3-fri-v0.5.1","p3-field-v0.5.1","p3-field-testing-v0.5.1","p3-dft-v0.5.1","p3-commit-v0.5.1","p3-circle-v0.5.1","p3-challenger-v0.5.1","p3-bn254-v0.5.1","p3-blake3-v0.5.1","p3-blake3-air-v0.5.1","p3-batch-stark-v0.5.1","p3-baby-bear-v0.5.1","p3-air-v0.5.1","v0.4.2","p3-util-v0.4.2","p3-uni-stark-v0.4.2","p3-symmetric-v0.4.2","p3-sha256-v0.4.2","p3-rescue-v0.4.2","p3-poseidon2-v0.4.2","p3-poseidon2-air-v0.4.2","p3-poseidon-v0.4.2","p3-multilinear-util-v0.4.2","p3-monty-31-v0.4.2","p3-monolith-v0.4.2","p3-mersenne-31-v0.4.2","p3-merkle-tree-v0.4.2","p3-mds-v0.4.2","p3-maybe-rayon-v0.4.2","p3-matrix-v0.4.2","p3-lookup-v0.4.2","p3-koala-bear-v0.4.2","p3-keccak-v0.4.2","p3-keccak-air-v0.4.2","p3-interpolation-v0.4.2","p3-goldilocks-v0.4.2","p3-fri-v0.4.2","p3-field-v0.4.2","p3-field-testing-v0.4.2","p3-dft-v0.4.2","p3-commit-v0.4.2","p3-circle-v0.4.2","p3-challenger-v0.4.2","p3-bn254-v0.4.2","p3-blake3-v0.4.2","p3-blake3-air-v0.4.2","p3-batch-stark-v0.4.2","p3-baby-bear-v0.4.2","p3-air-v0.4.2","p3-util-v0.5.0","p3-uni-stark-v0.5.0","p3-symmetric-v0.5.0","p3-sha256-v0.5.0","p3-rescue-v0.5.0","p3-poseidon2-v0.5.0","p3-poseidon2-air-v0.5.0","p3-poseidon1-v0.5.0","p3-poseidon1-air-v0.5.0","p3-multilinear-util-v0.5.0","p3-monty-31-v0.5.0","p3-monolith-v0.5.0","p3-mersenne-31-v0.5.0","p3-merkle-tree-v0.5.0","p3-mds-v0.5.0","p3-matrix-v0.5.0","p3-lookup-v0.5.0","p3-koala-bear-v0.5.0","p3-keccak-v0.5.0","p3-keccak-air-v0.5.0","p3-interpolation-v0.5.0","p3-goldilocks-v0.5.0","p3-fri-v0.5.0","p3-field-v0.5.0","p3-field-testing-v0.5.0","p3-dft-v0.5.0","p3-commit-v0.5.0","p3-circle-v0.5.0","p3-challenger-v0.5.0","p3-bn254-v0.5.0","p3-blake3-v0.5.0","p3-blake3-air-v0.5.0","p3-batch-stark-v0.5.0","p3-baby-bear-v0.5.0","p3-air-v0.5.0","v0.5.0","p3-maybe-rayon-v0.5.0","v0.4.1","p3-util-v0.4.1","p3-maybe-rayon-v0.4.1","p3-util-v0.4.0","p3-maybe-rayon-v0.4.0","v0.4.0","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46654.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}