PT-2025-34495 · Gnark · Gnark

A7Um + 3 · Published 2025-08-22 · Updated 2025-11-17 · CVE-2025-57801

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: gnark versions prior to 0.14.0

Description: gnark is a zero-knowledge proof system framework. 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 issue. This is due to a lack of essential constraints in gnark’s native EdDSA and ECDSA circuits, allowing multiple distinct witnesses to 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.

Recommendations: Update to version 0.14.0 to resolve this issue.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2025-57801

GHSA-95V9-HV42-PWRJ

GO-2025-3912

Affected Products

Gnark

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/57xxx/CVE-2025-57801.json · Exploit
• https://github.com/Consensys/gnark/security/advisories/GHSA-95v9-hv42-pwrj · Vendor Advisory
• https://github.com/Consensys/gnark/commit/0ba6730f05537a351517998add89a61a0d82716e · Patch
• https://osv.dev/vulnerability/GO-2025-3912 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-95v9-hv42-pwrj · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-57801 · Security Note
• https://osv.dev/vulnerability/CVE-2025-57801 · Vendor Advisory
• https://github.com/Consensys/gnark · Note
• https://twitter.com/blaze__team/status/1987756593904279940 · Twitter Post
• https://pkg.go.dev/vuln/GO-2025-3912 · Note
• https://twitter.com/VulmonFeeds/status/1959080389449785408 · Twitter Post
• https://twitter.com/CveFindCom/status/1958985097715028149 · Twitter Post
• https://t.me/CVEtracker/30732 · Telegram Post
• https://twitter.com/CVEnew/status/1958995453053374676 · Twitter Post
• https://reddit.com/r/CVEWatch/comments/1ozdgd3/top_10_trending_cves_17112025 · Reddit Post