{"schemaVersion":3,"id":"CVE-2025-57801","aliases":["GHSA-95v9-hv42-pwrj","GO-2025-3912"],"status":"published","duplicateOf":null,"title":"gnark is vulnerable to signature malleability in EdDSA and ECDSA due to missing scalar checks","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 ≤ 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. 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