CVE-2026-41405
OpenClaw: MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion
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.
How to fix CVE-2026-41405
To remediate CVE-2026-41405, upgrade the affected package to a fixed version below.
- —upgrade to 2026.3.31 or later
Is CVE-2026-41405 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2026.3.31
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |