OpenClaw: MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion
## 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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-41405US | — | — | ||
OpenClaw before 2026.3.31 parses MS Teams webhook request bodies before performing JWT validation, allowing unauthenticated attackers to trigger resource exhaustion. Remote attacke… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/openclaw/openclawPACKAGE
- https://github.com/openclaw/openclaw/commit/3834d47099dd13c8244ed6de8b9ea9855c553623WEB
- https://github.com/openclaw/openclaw/releases/tag/v2026.3.31WEB
- https://github.com/openclaw/openclaw/security/advisories/GHSA-p464-m8x6-vhv8WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-41405ADVISORY
- https://www.vulncheck.com/advisories/openclaw-resource-exhaustion-via-unauthenticated-ms-teams-webhook-body-parsingWEB
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