AI agent vulnerability · OpenClaw

CVE-2026-41405: OpenClaw: MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion

highCVSS 4.0 8.7 · 3.1 7.5GHSA-p464-m8x6-vhv8

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.

Published Apr 3, 2026 · Updated May 6, 2026

Affected packages

openclaw

Ecosystem: npm
Affected: <= 2026.3.28
Fixed in: 2026.3.31
Check: npm ls openclaw

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

Credited to AntAISecurityLab.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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