GHSA-chqm-wxm2-w73w: Duplicate Advisory OpenClaw: Mattermost Handlers Could Fall Vulnerability

MODERATE
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CVSS 3.7
CWE-636
Published
Advisory Summary

GHSA-chqm-wxm2-w73w is a MODERATE (CVSS 3.7) openclaw: mattermost handlers could fall vulnerability (CWE-636: Not Failing Securely ('Failing Open')) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves openclaw: mattermost handlers could fall open when channel type was missing. Remediation is available by upgrading affected packages to version 2026.5.6.

GHSA-chqm-wxm2-w73w at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-chqm-wxm2-w73w
Severity MODERATE
CVSS v3.1 Base Score 3.7
CWE Classification CWE-636: Not Failing Securely ('Failing Open')
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 3.7

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

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

How to Fix GHSA-chqm-wxm2-w73w

To remediate this vulnerability, upgrade all affected Duplicate Advisory 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: 2026.5.6 
npm install openclaw@2026.5.6
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 GHSA-chqm-wxm2-w73w, inspect your project dependencies using npm:

npm ls openclaw

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2026.5.6), 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-636: Not Failing Securely ('Failing Open'), where when the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that are available, such as selecting the weakest encryption algorithm or using the most permissive access control restrictions. In Duplicate Advisory, 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

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-gp79-m99v-gjmh. This link is maintained to preserve external references. ### Original Description OpenClaw before 2026.5.6 contains an improper access control vulnerability in Mattermost event handlers that fails to validate channel type metadata. Attackers can bypass intended DM policy decisions by sending crafted Mattermost events missing channel type information to process restricted content.

GHSA-chqm-wxm2-w73w Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
2026.5.6
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.5.6
2026.5.6

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-gp79-m99v-gjmh
NVD — GHSA-chqm-wxm2-w73w NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53837
Duplicate Advisory Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-missing-channel-type-validation-in-mattermost-event-handlers

Frequently Asked Questions

What is GHSA-chqm-wxm2-w73w?
GHSA-chqm-wxm2-w73w is a security vulnerability in Duplicate Advisory involving OpenClaw: Mattermost handlers could fall open when channel type was missing under CWE-636: Not Failing Securely ('Failing Open').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 2026.5.6 across affected packages: openclaw.
What version fixes GHSA-chqm-wxm2-w73w?
Upgrading to 2026.5.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.5.6. Upgrade your dependency to 2026.5.6 or later.
What is the CVSS score of GHSA-chqm-wxm2-w73w?
GHSA-chqm-wxm2-w73w has a CVSS v3.1 base score of 3.7 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with GHSA-chqm-wxm2-w73w?
GHSA-chqm-wxm2-w73w is classified under CWE-636: Not Failing Securely ('Failing Open') (When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that are available, such as selecting the weakest encryption algorithm or using the most permissive access control restrictions.).
How can I check npm dependencies for GHSA-chqm-wxm2-w73w?
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-chqm-wxm2-w73w",
  "modified" : "2026-08-28T15:53:21Z",
  "published" : "2026-06-13T00:34:33Z",
  "withdrawn" : "2026-08-28T15:53:21Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: OpenClaw: Mattermost handlers could fall open when channel type was missing",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-gp79-m99v-gjmh. This link is maintained to preserve external references.\n\n### Original Description\nOpenClaw before 2026.5.6 contains an improper access control vulnerability in Mattermost event handlers that fails to validate channel type metadata. Attackers can bypass intended DM policy decisions by sending crafted Mattermost events missing channel type information to process restricted content.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.5.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-gp79-m99v-gjmh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-53837"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-missing-channel-type-validation-in-mattermost-event-handlers"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-636" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-28T15:53:21Z",
    "nvd_published_at" : "2026-06-12T22:16:55Z"
  }
}