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.

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.

EPSS: 0.003 (17.6th percentile) — read the EPSS interpretation.

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.

Affected products

Openclaw — versions 2026.2.1, 0

Weakness classification (CWE)

CWE-201 — Insertion of Sensitive Information into Sent Data

References

disclosure@vulncheck.com (vendor-advisory, Vendor Advisory)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (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.