CVE-2026-62213 in MS Teams
Summary
by MITRE • 07/17/2026
OpenClaw versions before 2026.5.27 contain a token leakage vulnerability in MS Teams outbound requests that allows lower-trust callers to expose Bot Framework tokens. Attackers can access configured input paths to retrieve credentials that should remain within the trusted boundary.
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Analysis
by VulDB Data Team • 07/17/2026
The OpenClaw software stack prior to version 2026.5.27 contains a critical token leakage vulnerability that specifically affects Microsoft Teams outbound request processing within the Bot Framework ecosystem. This vulnerability stems from improper handling of authentication tokens during external communications, creating an attack surface where untrusted entities can potentially access sensitive Bot Framework credentials. The flaw exists in how the system manages token propagation when making outbound requests through the Teams integration layer, allowing malicious actors with lower privilege access to exploit this weakness and extract valuable authentication artifacts.
The technical implementation of this vulnerability resides in the token management subsystem that handles credential delegation between the OpenClaw platform and Microsoft Teams services. When the system processes outbound requests from Teams bots, it fails to properly validate or sanitize the token context, enabling unauthorized access to the underlying Bot Framework tokens. This represents a classic case of inadequate access control enforcement where the system does not properly enforce trust boundaries during inter-service communication. The vulnerability operates at the application layer and can be classified under CWE-284 Access Control Issues, specifically related to improper privilege management and insufficient token validation mechanisms.
The operational impact of this vulnerability extends beyond simple credential exposure, as it compromises the entire security posture of organizations relying on OpenClaw for Teams integration. Attackers who successfully exploit this weakness can potentially impersonate legitimate bot services, access restricted resources, and perform unauthorized actions within the Teams environment. The affected input paths represent the entry points where external requests are processed, and these paths contain hardcoded or dynamically generated credentials that should remain within the trusted operational boundary. This creates a significant risk for organizations using automated workflows, as compromised tokens could enable lateral movement and persistent access to their Microsoft Teams infrastructure.
Security professionals should implement immediate mitigations including updating to OpenClaw version 2026.5.27 or later, which addresses this vulnerability through enhanced token validation and proper boundary enforcement. Network segmentation controls should be deployed to limit outbound requests from Teams bots and monitor for suspicious token usage patterns. Organizations should also review their Bot Framework configurations to ensure that tokens are properly scoped and that unnecessary permissions are not granted to automated services. The ATT&CK framework categorizes this vulnerability under T1566 Initial Access through credential exposure, with potential progression toward T1078 Valid Accounts and T1531 Account Access Removal if attackers escalate privileges using compromised credentials. Regular security assessments should include verification of token handling mechanisms and proper enforcement of trust boundaries in integrated communication platforms.