CVE-2025-57801

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. This issue has been addressed in version 0.14.0.

CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
consensys	gnark	< 0.14.0

References

Advisories & Patches

https://github.com/Consensys/gnark/commit/0ba6730f05537a351517998add89a61a0d82716e https://github.com/Consensys/gnark/security/advisories/GHSA-95v9-hv42-pwrj

Exploits

https://github.com/Consensys/gnark/security/advisories/GHSA-95v9-hv42-pwrj

Frequently Asked Questions

What is CVE-2025-57801? +

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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-57801? +

CVE-2025-57801 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-57801? +

CVE-2025-57801 affects products from consensys, specifically: gnark. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-57801? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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