OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-201.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenClaw | OpenClaw | up to 2026.1.30 | 2026.2.1 | Patch available | CNA |
| — | openclaw (npm) | before 2026.2.1 | 2026.2.1 | Patch available | GHSA-7vwx-582j-j332 |
- OpenClaw VendorOpenClaw Affected up to 2026.1.30 Fixed in 2026.2.1 Patch available CNA
- openclaw (npm) Vendor— Affected before 2026.2.1 Fixed in 2026.2.1 Patch available GHSA-7vwx-582j-j332
Remediation
- Fix · CNA OpenClaw (OpenClaw) Fixed in 2026.2.1
- Fix · GHSA-7vwx-582j-j332 openclaw (npm) Fixed in 2026.2.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-28481
- 2026-10-03 Alias added: GHSA-7vwx-582j-j332
References
More Openclaw vulnerabilities
- TI-2026-25309 OpenClaw < 2026.3.28 Media Parsing Path Traversal to Arbitrary File Read CVSS 4.0HIGH 8.7
- TI-2026-20394 Exposure of resource to wrong sphere in OpenClaw CVSS 3.1HIGH 8.8
- TI-2026-27742 OpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installation CVSS 4.0HIGH 8.4
- TI-2026-27766 OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing CVSS 4.0MEDIUM 6.9
- TI-2026-07315 OpenClaw bluebubbles Webhook monitor.ts handleBlueBubblesWebhookRequest improper authentication CVSS 4.0MEDIUM 6.9
- TI-2026-17789 OpenClaw < 2026.2.22 - Allowlist Bypass via Command Substitution in system.run CVSS 4.0HIGH 7.5
Sources
- CVE-2026-28481 · CVE Program
- CVE-2026-28481 · NVD
- FIRST EPSS
- GHSA-7vwx-582j-j332 · GitHub Advisory Database · CC BY 4.0
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