CVE-2026-42437: OpenClaw Voice-call Realtime WebSocket Accepted Oversized Vulnerability

HIGH
Advisory Identifier: GHSA-vw3h-q6xq-jjm5
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CVSS 7.5
CWE-400 CWE-770
Published
Advisory Summary

CVE-2026-42437 is a HIGH (CVSS 7.5) voice-call realtime websocket accepted oversized vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting OpenClaw libraries in the npm ecosystem. The issue involves voice-call realtime websocket accepted oversized frames. Remediation is available by upgrading affected packages to version 2026.4.10.

CVE-2026-42437 at a Glance

CVE Identifier CVE-2026-42437
GHSA Identifier GHSA-vw3h-q6xq-jjm5
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product OpenClaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:H).

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 High (A:H)

How to Fix CVE-2026-42437

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: 2026.4.10 
npm install openclaw@2026.4.10
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-2026-42437, 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 2026.4.10), 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 Voice-call realtime WebSocket accepted oversized frames. ## Affected Packages / Versions - Package: `openclaw` - Ecosystem: npm - Affected versions: `>= 2026.4.9 < 2026.4.10` - Patched versions: `>= 2026.4.10` ## Impact The voice-call realtime WebSocket path could accept oversized frames, creating a remote availability risk for deployments exposing that webhook path. ## Technical Details The fix rejects oversized realtime WebSocket frames before processing them. ## Fix The issue was fixed in #63890. The first stable tag containing the fix is `v2026.4.10`, and `openclaw@2026.4.14` includes the fix. ## Fix Commit(s) - `afadb7dae6738819ad9c7d2597ace0516957d20e` - PR: #63890 ## Release Process Note Users should upgrade to `openclaw` 2026.4.10 or newer. The latest npm release, `2026.4.14`, already includes the fix. ## Reporters Thanks to G0odUser from ADLab of VenusTech Thanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.

CVE-2026-42437 Affected OpenClaw Versions

1 component(s)
Fixed Versions:
2026.4.10
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
≥ 2026.4.9
< 2026.4.10
2026.4.10

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5
NVD — CVE-2026-42437 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42437
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw/pull/63890
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path

Frequently Asked Questions

What is CVE-2026-42437?
CVE-2026-42437 is a security vulnerability in OpenClaw involving Voice-call realtime WebSocket accepted oversized frames under CWE-400: Uncontrolled Resource Consumption.
Which OpenClaw versions are affected?
Affected versions include releases prior to 2026.4.10 across affected packages: openclaw.
What version fixes CVE-2026-42437?
Upgrading to 2026.4.10 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.4.10. Upgrade your dependency to 2026.4.10 or later.
What is the CVSS score of CVE-2026-42437?
CVE-2026-42437 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-42437?
CVE-2026-42437 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-2026-42437?
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-vw3h-q6xq-jjm5",
  "modified" : "2026-06-08T23:25:32Z",
  "published" : "2026-04-17T21:48:36Z",
  "aliases" : [ "CVE-2026-42437" ],
  "summary" : "OpenClaw: Voice-call realtime WebSocket accepted oversized frames",
  "details" : "## Summary\n\nVoice-call realtime WebSocket accepted oversized frames.\n\n## Affected Packages / Versions\n\n- Package: `openclaw`\n- Ecosystem: npm\n- Affected versions: `>= 2026.4.9 < 2026.4.10`\n- Patched versions: `>= 2026.4.10`\n\n## Impact\n\nThe voice-call realtime WebSocket path could accept oversized frames, creating a remote availability risk for deployments exposing that webhook path.\n\n## Technical Details\n\nThe fix rejects oversized realtime WebSocket frames before processing them.\n\n## Fix\n\nThe issue was fixed in #63890. The first stable tag containing the fix is `v2026.4.10`, and `openclaw@2026.4.14` includes the fix.\n\n## Fix Commit(s)\n\n- `afadb7dae6738819ad9c7d2597ace0516957d20e`\n- PR: #63890\n\n## Release Process Note\n\nUsers should upgrade to `openclaw` 2026.4.10 or newer. The latest npm release, `2026.4.14`, already includes the fix.\n\n## Reporters\n\nThanks to G0odUser from ADLab of VenusTech\nThanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2026.4.9"
      }, {
        "fixed" : "2026.4.10"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-42437"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/pull/63890"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-17T21:48:36Z",
    "nvd_published_at" : "2026-05-05T12:16:18Z"
  }
}