OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching
Summary
OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- advisory vulncheck.com
- patch github.com