gnark is vulnerable to signature malleability in EdDSA and ECDSA due to missing scalar checks_CVE-2025-57801

{
    "lastseen": "",
    "description": "gnark is a zero-knowledge proof system framework. In versions prior to 0.14.0, the Verify function in eddsa.go and ecdsa.go used the S value from a signature without asserting that 0 \u2264 S < order, leading to a signature malleability vulnerability. Because gnark\u2019s native EdDSA and ECDSA circuits lack essential constraints, multiple distinct witnesses can satisfy the same public inputs. In protocols where nullifiers or anti-replay checks are derived from R and S, this enables signature malleability and may allow double spending. This issue has been addressed in version 0.14.0.",
    "published": "2025-08-22T19:54:05.854Z",
    "modified": "2025-08-22T20:06:00.913Z",
    "type": "cve",
    "title": "gnark is vulnerable to signature malleability in EdDSA and ECDSA due to missing scalar checks",
    "source": "GitHub_M",
    "references": "https://github.com/Consensys/gnark/security/advisories/GHSA-95v9-hv42-pwrj\nhttps://github.com/Consensys/gnark/commit/0ba6730f05537a351517998add89a61a0d82716e",
    "id": "CVE-2025-57801",
    "bulletinFamily": "",
    "cwe": [
        "CWE-347"
    ],
    "cvelist": null,
    "sourceData": "Consensys gnark < 0.14.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "gnark",
    "version": "< 0.14.0",
    "vendor": "Consensys",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}