In short
- CVE-2026-41405 is a HIGH (CVSS 7.5) vulnerability affecting openclaw (openclaw), openclaw.
- Chance of exploitation in the next 30 days (EPSS): 0.48%, higher than 41.5% of all vulnerabilities.
- Fix: update to 2026.3.31 or later.
| Package | Affected versions | Patched versions |
|---|
| openclaw | < 2026.3.31
| 2026.3.31
|
| openclaw npm | < 2026.3.31
| 2026.3.31
|
Description
Summary
MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion
Current Maintainer Triage
- Status: open
- Normalized severity: medium
- Assessment: v2026.3.28 still parses Teams JSON after only a Bearer-prefix gate and before real JWT validation, and the auth-before-parse fix is not yet shipped.
Affected Packages / Versions
- Package:
openclaw (npm)
- Latest published npm version:
2026.3.31
- Vulnerable version range:
<=2026.3.28
- Patched versions:
>= 2026.3.31
- First stable tag containing the fix:
v2026.3.31
Fix Commit(s)
3834d47099dd13c8244ed6de8b9ea9855c553623 — 2026-03-30T13:46:40+01:00
OpenClaw thanks @AntAISecurityLab for reporting.
NVD description
OpenClaw before 2026.3.31 parses MS Teams webhook request bodies before performing JWT validation, allowing unauthenticated attackers to trigger resource exhaustion. Remote attackers can send malicious Teams webhook payloads to exhaust server resources by bypassing authentication checks.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free