Vulnerability in Openclaw
CVE-2026-28481
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Openclaw — versions 2026.2.1, 0
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332 (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b (Patch, patch)
- www.vulncheck.com/advisories/openclaw-bearer-token-leakage-via-ms-teams-attachm… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-28481?
- CVE-2026-28481 is a medium-severity vulnerability in Openclaw, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.5/10. Published 2026-03-05.
- How severe is CVE-2026-28481?
- Medium severity. CVSS v3 base score is 6.5 out of 10.