Resource Exhaustion Vulnerability in OpenClaw Package

openclaw Updated 10 Apr 2026

Summary

10/04/2026

Disclosed on

MODERATE

Severity

Yes i

Fix available

Moderate

Severity

5.3

CVSS Score

GHSA-36cp-mh65-x882: Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-rm59-992w-x2mv. Affects openclaw versions < 2026.3.22. Fixed in 2026.3.22. How to fix ↓

Free scan

Check if this vulnerability affects your application

Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or Browse

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats

SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml

Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile

Javascript package-lock.json · yarn.lock · pnpm-lock.yaml

PHP composer.lock

Python poetry.lock · requirements.txt · Pipfile.lock

Go go.mod

Rust Cargo.lock

Ruby Gemfile.lock

Dart pubspec.lock

C/C++ conan.lock

Elixir mix.lock

Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Background

OpenClaw is an open-source package designed for handling voice call webhooks, enabling developers to integrate telephony features into their applications. It is built on the npm ecosystem and is widely used for its ease of use and flexibility. However, prior to version 2026.3.22, OpenClaw is susceptible to a critical vulnerability that allows unauthenticated attackers to exploit its webhook handling mechanism.

Vulnerability Detail

The vulnerability in OpenClaw arises from its handling of voice call webhook requests. Specifically, before version 2026.3.22, the package buffers request bodies without performing necessary provider signature checks. This oversight allows attackers to send large or malicious webhook requests, leading to resource exhaustion on the server. The lack of authentication means that any attacker can exploit this vulnerability, potentially causing denial of service and impacting the availability of the application.

How To Fix

Latest published version: 2026.10.6 as of 22 Oct 2026

npm install openclaw@2026.10.6

Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.

If you need the minimum change

2026.3.22

This is the first release that contains the fix.

npm install openclaw@2026.3.22

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

Workaround

As a temporary measure, you can implement rate limiting on your webhook endpoint to mitigate the risk of resource exhaustion. This can be done using middleware in your application that restricts the number of requests from a single source within a specified timeframe.

Conclusion

The OpenClaw package has a resource exhaustion vulnerability that can be exploited by unauthenticated attackers. It is crucial to update to version 2026.3.22 or later to mitigate this risk. Additionally, utilizing tools like Vulert can help monitor for such vulnerabilities in your applications.

See every vulnerability recorded for openclaw →