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 ≤ S < order, leading to a signature malleability vulnerability. Because gnark’s 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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/57xxx/CVE-2025-57801.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-347"
]
}