{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.4.3"
              },
              {
                "introduced": "0.5.0"
              },
              {
                "fixed": "0.5.3"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "36829360ee8a04ab0a76f84f60710fc5bd66567c"
            },
            {
              "introduced": "af2a6a755f4e8584e26bcea31b7ab6174b935153"
            },
            {
              "fixed": "cf8b088497b87ff83cd1d80349e8bba370907c03"
            }
          ],
          "repo": "https://github.com/plonky3/plonky3",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vj64-rjf3-w3v7"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1240",
      "CWE-345"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46654.json"
  },
  "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.",
  "id": "CVE-2026-46654",
  "modified": "2026-07-08T05:39:23.071183709Z",
  "published": "2026-06-10T20:06:10.554Z",
  "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"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Plonky3 MultiField32Challenger: transcript malleability and challenge entropy loss"
}