OpenClaw versions 2026.1.30 and earlier, contain an information disclosure vulnerability, patched in 2026.2.1, in the MS Teams attachment downloader (optional extension must be enabled) that leaks bearer tokens to allowlisted suffix domains. When retrying downloads after receiving 401 or 403 responses, the application sends Authorization bearer tokens to untrusted hosts matching the permissive suffix-based allowlist, enabling token theft.
Attack Parameters
Attack Vector
Network
Атака возможна удалённо
Attack Complexity
Low
Легко эксплуатировать
Attack Requirements
Present
Нужны дополнительные условия
Privileges Required
None
Права не нужны
User Interaction
Active
Нужно действие пользователя
Impact Assessment
Confidentiality
High
Полная утечка данных
Integrity
None
Нет модификации данных
Availability
None
Нет нарушения работы
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/openclaw/openclaw/commit/41cc5bcd4f1d434ad1bbdfa55b56f25025e…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-bearer-token-leakage-via-ms-teams…
disclosure@vulncheck.com