CVE-2026-34506: Openclaw OpenClaw's MS Teams Sender Allowlist Vulnerability

MODERATE
Advisory Identifier: GHSA-g7cr-9h7q-4qxq
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CWE-289
Published
Advisory Summary

CVE-2026-34506 is a MODERATE openclaw's ms teams sender allowlist vulnerability (CWE-289: Authentication Bypass by Alternate Name) affecting Openclaw libraries in the npm ecosystem. The issue involves openclaw's ms teams sender allowlist bypass when route allowlist is configured and sender allowlist is empty. Remediation is available by upgrading affected packages to version 2026.3.8.

CVE-2026-34506 at a Glance

CVE Identifier CVE-2026-34506
GHSA Identifier GHSA-g7cr-9h7q-4qxq
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-289: Authentication Bypass by Alternate Name
Affected Product Openclaw
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-34506

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: 2026.3.8 
npm install openclaw@2026.3.8
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-2026-34506, 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 2026.3.8), 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-289: Authentication Bypass by Alternate Name, where the product performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor. 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

OpenClaw's Microsoft Teams plugin widened group sender authorization when a team/channel route allowlist was configured but `groupAllowFrom` was empty. Before the fix, a matching route allowlist entry could cause the message handler to synthesize wildcard sender authorization for that route, allowing any sender in the matched team/channel to bypass the intended `groupPolicy: "allowlist"` sender check. This does not affect default unauthenticated access, but it does weaken a documented Teams group authorization boundary and can allow unauthorized group senders to trigger replies in allowlisted Teams routes. ## Affected Packages / Versions - Package: `openclaw` (npm) - Latest published vulnerable version: `2026.3.7` - Affected range: `<= 2026.3.7` - Fixed in released version: `2026.3.8` ## Fix Commit(s) - `88aee9161e0e6d32e810a25711e32a808a1777b2` ## Release Verification - Verified fixed in GitHub release `v2026.3.8` published on March 9, 2026. - Verified `npm view openclaw version` resolves to `2026.3.8`. - Verified the release contains the regression test covering the Teams route-allowlist sender-bypass case and that the test passes against the `v2026.3.8` tree. Thanks @zpbrent for reporting.

CVE-2026-34506 Affected Openclaw Versions

1 component(s)
Fixed Versions:
2026.3.8
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.3.8
2026.3.8

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-g7cr-9h7q-4qxq
NVD — CVE-2026-34506 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34506
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/88aee9161e0e6d32e810a25711e32a808a1777b2
Openclaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-sender-allowlist-bypass-in-microsoft-teams-plugin-via-route-allowlist-configuration

Frequently Asked Questions

What is CVE-2026-34506?
CVE-2026-34506 is a security vulnerability in Openclaw involving OpenClaw's MS Teams sender allowlist bypass when route allowlist is configured and sender allowlist is empty under CWE-289: Authentication Bypass by Alternate Name.
Which Openclaw versions are affected?
Affected versions include releases prior to 2026.3.8 across affected packages: openclaw.
What version fixes CVE-2026-34506?
Upgrading to 2026.3.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.3.8. Upgrade your dependency to 2026.3.8 or later.
What CWE is associated with CVE-2026-34506?
CVE-2026-34506 is classified under CWE-289: Authentication Bypass by Alternate Name (The product performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor.).
How can I check npm dependencies for CVE-2026-34506?
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-g7cr-9h7q-4qxq",
  "modified" : "2026-04-06T22:45:49Z",
  "published" : "2026-03-12T14:21:35Z",
  "aliases" : [ "CVE-2026-34506" ],
  "summary" : "OpenClaw's MS Teams sender allowlist bypass when route allowlist is configured and sender allowlist is empty",
  "details" : "OpenClaw's Microsoft Teams plugin widened group sender authorization when a team/channel route allowlist was configured but `groupAllowFrom` was empty. Before the fix, a matching route allowlist entry could cause the message handler to synthesize wildcard sender authorization for that route, allowing any sender in the matched team/channel to bypass the intended `groupPolicy: \"allowlist\"` sender check.\n\nThis does not affect default unauthenticated access, but it does weaken a documented Teams group authorization boundary and can allow unauthorized group senders to trigger replies in allowlisted Teams routes.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Latest published vulnerable version: `2026.3.7`\n- Affected range: `<= 2026.3.7`\n- Fixed in released version: `2026.3.8`\n\n## Fix Commit(s)\n\n- `88aee9161e0e6d32e810a25711e32a808a1777b2`\n\n## Release Verification\n\n- Verified fixed in GitHub release `v2026.3.8` published on March 9, 2026.\n- Verified `npm view openclaw version` resolves to `2026.3.8`.\n- Verified the release contains the regression test covering the Teams route-allowlist sender-bypass case and that the test passes against the `v2026.3.8` tree.\n\nThanks @zpbrent for reporting.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/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" : "2026.3.8"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.3.7"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-g7cr-9h7q-4qxq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34506"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/88aee9161e0e6d32e810a25711e32a808a1777b2"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-sender-allowlist-bypass-in-microsoft-teams-plugin-via-route-allowlist-configuration"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-289" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-12T14:21:35Z",
    "nvd_published_at" : null
  }
}