CVE-2026-41400: OpenClaw Voice-call Still Parses Large WebSocket Vulnerability

MODERATE
Advisory Identifier: GHSA-2w79-r9g8-wmcr
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CVSS 5.3
CWE-400 CWE-770
Published
Advisory Summary

CVE-2026-41400 is a MODERATE (CVSS 5.3) voice-call still parses large websocket vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting OpenClaw libraries in the npm ecosystem. The issue involves voice-call still parses large websocket frames before start validation (incomplete fix for cve-2026-32062). Remediation is available by upgrading affected packages to version 2026.3.31.

CVE-2026-41400 at a Glance

CVE Identifier CVE-2026-41400
GHSA Identifier GHSA-2w79-r9g8-wmcr
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product OpenClaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-41400

To remediate this vulnerability, upgrade all affected OpenClaw dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openclaw fixed: 2026.3.31 
npm install openclaw@2026.3.31
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls openclaw

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-41400, inspect your project dependencies using npm:

npm ls openclaw

Analyze the terminal output to locate any version of OpenClaw in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2026.3.31), your application is affected.

Note: The npm ls openclaw command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In OpenClaw, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary Incomplete fix for CVE-2026-32062: voice-call still parses large WebSocket frames before start validation ## Current Maintainer Triage - Normalized severity: medium - Assessment: v2026.3.28 still parses oversized pre-start voice-call WebSocket frames before start validation, and the unreleased maxPayload fix confirms the shipped resource-consumption bug remains open. ## Affected Packages / Versions - Package: `openclaw` (npm) - Latest published npm version: `2026.3.31` - Vulnerable version range: `<=2026.3.28` - Patched versions: `>= 2026.3.31` - First stable tag containing the fix: `v2026.3.31` ## Fix Commit(s) - `9abcfdadf591bf266d85fbdfe14ae833e557a110` — 2026-03-31T19:47:10+09:00 OpenClaw thanks @Kazamayc for reporting.

CVE-2026-41400 Affected OpenClaw Versions

1 component(s)
Fixed Versions:
2026.3.31
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.3.31
2026.3.31

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-2w79-r9g8-wmcr
NVD — CVE-2026-41400 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41400
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/9abcfdadf591bf266d85fbdfe14ae833e557a110
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
OpenClaw Release RELEASE
https://github.com/openclaw/openclaw/releases/tag/v2026.3.31
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-resource-consumption-via-oversized-websocket-frames-in-voice-call

Frequently Asked Questions

What is CVE-2026-41400?
CVE-2026-41400 is a security vulnerability in OpenClaw involving Voice-call still parses large WebSocket frames before start validation (Incomplete fix for CVE-2026-32062) under CWE-400: Uncontrolled Resource Consumption.
Which OpenClaw versions are affected?
Affected versions include releases prior to 2026.3.31 across affected packages: openclaw.
What version fixes CVE-2026-41400?
Upgrading to 2026.3.31 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.3.31. Upgrade your dependency to 2026.3.31 or later.
What is the CVSS score of CVE-2026-41400?
CVE-2026-41400 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-41400?
CVE-2026-41400 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2026-41400?
Run the dependency tree command: 'npm ls openclaw'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2w79-r9g8-wmcr",
  "modified" : "2026-05-06T02:40:46Z",
  "published" : "2026-04-03T03:13:35Z",
  "aliases" : [ "CVE-2026-41400" ],
  "summary" : "OpenClaw: Voice-call still parses large WebSocket frames before start validation (Incomplete fix for CVE-2026-32062)",
  "details" : "## Summary\nIncomplete fix for CVE-2026-32062: voice-call still parses large WebSocket frames before start validation\n\n## Current Maintainer Triage\n- Normalized severity: medium\n- Assessment: v2026.3.28 still parses oversized pre-start voice-call WebSocket frames before start validation, and the unreleased maxPayload fix confirms the shipped resource-consumption bug remains open.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Latest published npm version: `2026.3.31`\n- Vulnerable version range: `<=2026.3.28`\n- Patched versions: `>= 2026.3.31`\n- First stable tag containing the fix: `v2026.3.31`\n\n## Fix Commit(s)\n- `9abcfdadf591bf266d85fbdfe14ae833e557a110` — 2026-03-31T19:47:10+09:00\n\nOpenClaw thanks @Kazamayc for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.3.31"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.3.28"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-2w79-r9g8-wmcr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41400"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/9abcfdadf591bf266d85fbdfe14ae833e557a110"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/releases/tag/v2026.3.31"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-resource-consumption-via-oversized-websocket-frames-in-voice-call"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-03T03:13:35Z",
    "nvd_published_at" : "2026-04-28T19:37:43Z"
  }
}