OpenClaw MS Teams inbound attachment downloader leaks bearer tokens to allowlisted suffix domains
Summary
NOTE: This only affects deployments that enable the optional MS Teams extension (Teams channel). If you do not use MS Teams, you are not impacted.
When OpenClaw downloads inbound MS Teams attachments / inline images, it may retry a URL with an Authorization: Bearer <token> header after receiving 401 or 403.
Because the default download allowlist uses suffix matching (and includes some multi-tenant suffix domains), a message that references an untrusted but allowlisted host could cause that bearer token to be sent to the wrong place.
Affected Packages / Versions
- Package:
openclaw(npm) - Vulnerable:
<= 2026.1.30 - Patched:
>= 2026.2.1
Fix
- Fix commit:
41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b - Upgrade to
openclaw >= 2026.2.1
Workarounds
- If you do not need MS Teams, disable the MS Teams extension.
- If you must stay on an older version, ensure the auth host allowlist is strict (only Microsoft-owned endpoints that require auth) and avoid wildcard or broad suffix entries.
Credits
Thanks @yueyueL for reporting.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | openclaw | < 2026.2.1 | 2026.2.1 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332
- https://nvd.nist.gov/vuln/detail/CVE-2026-28481
- https://github.com/openclaw/openclaw/commit/41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b
- https://github.com/openclaw/openclaw
- https://github.com/openclaw/openclaw/releases/tag/v2026.2.1
- https://www.vulncheck.com/advisories/openclaw-bearer-token-leakage-via-ms-teams-attachment-downloader-suffix-matching
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N- Weakness (CWE)
CWE-201- Platform
- npm
- Package
openclaw- Disclosed
- 17.02.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-7vwx-582j-j332 - CC BY 4.0
Vulnerability history: openclaw
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 588
- First → latest
- 02.2026 07.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 299
- Low 54
Disclosures per year
- 2026: 588
-
OpenClaw MS Teams inbound attachment downloader leaks bearer tokens to allowlisted suffix domains this entry
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