High severity · published Mar 5, 2026
CVE-2026-28481
OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenClaw · OpenClaw
through 2026.1.30 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28481
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28481
Patch
https://github.com/openclaw/openclaw/commit/41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b
Vendor Advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332
Third Party Advisory
https://www.vulncheck.com/advisories/openclaw-bearer-token-leakage-via-ms-teams-attachment-downloader-suffix-matching
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