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The vulnerability resides in the Microsoft Teams plugin’s message handler logic. When a system administrator configures a route allowlist for specific Teams channels but leaves the `groupAllowFrom` setting empty, the security mechanism fails. During message processing, if the incoming message matches a route on the allowlist, the handler incorrectly synthesizes a wildcard sender authorization. This means the intended `groupPolicy: “allowlist”` check, which should verify the sender against an approved list, is completely bypassed for that route. The system effectively treats the situation as if `groupAllowFrom` contained a wildcard entry. Consequently, any sender within that specific Team or Channel—even unauthorized users—can successfully trigger automated replies from the OpenClaw agent. This vulnerability does not affect default unauthenticated access scenarios, but it critically undermines the documented Teams group authorization boundary designed to restrict access to sensitive automated responses.
dailycve form:
Platform: OpenClaw
Version: 2026.3.7
Vulnerability : Authorization Bypass
Severity: Medium
date: Mar 09 2026
Prediction: Mar 09 2026
What Undercode Say:
Analytics:
This vulnerability exploits a logic flaw in conditional security checks. The error occurs when a route-specific allowlist exists, but the global group allowlist is empty, causing the system to default to an insecure “allow all” state for those specific routes rather than denying access.
Bash Commands and Codes:
Check current installed version of OpenClaw:
npm list openclaw
Update to the patched version (2026.3.8):
npm install [email protected]
Verify the update was successful:
npm view openclaw version
Inspect your Teams plugin configuration for potentially vulnerable settings (empty groupAllowFrom with teams allowlist):
cat ~/.openclaw/openclaw.json | grep -A 10 -B 5 "msteams" | grep -E "groupAllowFrom|teams"
How Exploit:
An attacker who is a member of a Team where the bot is installed, but who is NOT in the `groupAllowFrom` list, can simply post a message in an allowlisted channel. The vulnerable plugin processes the message, sees the channel is allowlisted, and mistakenly grants sender authorization, triggering a reply or action from the bot.
Protection:
- Immediate update to OpenClaw version 2026.3.8 using the npm update command.
- Verify the fix commit `88aee91` is present in your installation.
- Review Teams configurations to ensure `groupAllowFrom` is properly populated if `groupPolicy: “allowlist”` is used.
- Avoid relying on route allowlists as the sole access control mechanism without explicit sender validation.
Impact:
Unauthorized users within a Microsoft Teams environment can trigger the OpenClaw agent to respond in channels where they normally lack permission. This can lead to information disclosure through automated replies, unauthorized execution of agent workflows, and violation of intended access control boundaries set by administrators.
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Sources:
Reported By: github.com
Extra Source Hub:
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