EUVD-2026-17391
GHSA-xg59-f45v-9r9j
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
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.
Analysis
Authorization bypass in OpenClaw Microsoft Teams plugin (versions before 2026.3.8) permits unauthenticated attackers to circumvent sender allowlists when team/channel routes are configured with empty groupAllowFrom parameters. Remote attackers can exploit this network-accessible flaw with low complexity to trigger unauthorized message replies and access sensitive information in allowlisted Teams routes. …
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Remediation
Within 24 hours: Audit all OpenClaw plugin deployments to identify instances with empty groupAllowFrom parameters in team/channel routes. Within 7 days: Upgrade OpenClaw to version 2026.3.8 or later across all affected systems and verify allowlist configurations are properly populated. …
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External POC / Exploit Code
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