---
id: CVE-2026-34506
title: >-
  OpenClaw before 2026.3.8 contains a sender allowlist bypass vulnerability in
  its Microsoft Teams plugin that allows unauthorized senders to bypass intended
  authorization checks
summary: >-
  OpenClaw before 2026.3.8 contains a sender allowlist bypass vulnerability in
  its Microsoft Teams plugin that allows unauthorized senders to bypass intended
  authorization checks. When a team/channel route allowlist is configured with
  an e…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-863
vendor: openclaw
product: openclaw
affected:
  - openclaw < 2026.3.8
patched:
  - openclaw 2026.3.8
published: '2026-03-31'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34506'
references:
  - url: >-
      https://github.com/openclaw/openclaw/commit/88aee9161e0e6d32e810a25711e32a808a1777b2
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openclaw/openclaw/security/advisories/GHSA-g7cr-9h7q-4qxq
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openclaw-sender-allowlist-bypass-in-microsoft-teams-plugin-via-route-allowlist-configuration
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00345
epssPercentile: 0.25275
ingestedAt: '2026-07-24T22:40:25.354Z'
---

## Overview

OpenClaw before 2026.3.8 contains a sender allowlist bypass vulnerability in its Microsoft Teams plugin that allows unauthorized senders to bypass intended authorization checks. When a team/channel route allowlist is configured with an empty groupAllowFrom parameter, the message handler synthesizes wildcard sender authorization, permitting any sender in the matched team/channel to trigger replies in allowlisted Teams routes.

## Affected

- `openclaw < 2026.3.8`

## Remediation

Upgrade past the affected range:

- `openclaw 2026.3.8`