# OpenZeppelin Contracts vulnerable to ECDSA signature malleability

Advisory record · `GHSA-4h98-2769-gh6h`

- **Identifiers:** `GHSA-4h98-2769-gh6h` · `CVE-2022-35961`
- **State:** Confirmed
- **Severity:** CVSS 7.9 High
- **Critical:** No
- **Weakness (CWE):** [CWE-354](https://cwe.mitre.org/data/definitions/354.html)
- **Tags:** [CWE-354](https://agentprime.io/advisories/tag/cwe-354.md)
- **Published:** 18 Aug 2022
- **Updated:** 8 Nov 2023
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 18 Aug 2022, 19:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@openzeppelin/contracts` (npm): affected `>=4.1.0, <4.7.3`; fixed in `4.7.3`
- `@openzeppelin/contracts-upgradeable` (npm): affected `>=4.1.0, <4.7.3`; fixed in `4.7.3`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.9 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0045, the 39th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 18 Aug 2022. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-4h98-2769-gh6h](https://github.com/advisories/GHSA-4h98-2769-gh6h)
- [OSV: GHSA-4h98-2769-gh6h](https://osv.dev/vulnerability/GHSA-4h98-2769-gh6h)
- <https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4h98-2769-gh6h>
- <https://nvd.nist.gov/vuln/detail/CVE-2022-35961>
- <https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3610>
- <https://github.com/OpenZeppelin/openzeppelin-contracts/commit/d693d89d99325f395182e4f547dbf5ff8e5c3c87>
- <https://github.com/OpenZeppelin/openzeppelin-contracts>
- <https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.7.3>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-4h98-2769-gh6h>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-4h98-2769-gh6h/>. Everything for agents: <https://agentprime.io/llms.txt>.