CVE-2026-28481
OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-201 |
| Vendor | openclaw |
| Product | openclaw |
| Published | Mar 5, 2026 |
| Last Updated | Mar 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
OpenClaw / OpenClaw
0 ≤ 2026.1.30
References
github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332 github.com: https://github.com/openclaw/openclaw/commit/41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b vulncheck.com: https://www.vulncheck.com/advisories/openclaw-bearer-token-leakage-via-ms-teams-attachment-downloader-suffix-matching
Credits
🔍 Yue (Knox) Liu (@yueyueL)