CVE-2026-41405

OpenClaw < 2026.3.31 - Resource Exhaustion via Unauthenticated MS Teams Webhook Body Parsing

State: Published
Severity: 8.7 High
Published: Apr 28, 2026
Updated: Apr 29, 2026
Reserved: Apr 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	VulnCheck
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-408 Incorrect Behavior Order: Early Amplification

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.3.31Affected 2026.3.31Not affected

References

GitHub Security Advisory (GHSA-p464-m8x6-vhv8)vendor-advisory
Patch Commitpatch
VulnCheck Advisory: OpenClaw < 2026.3.31 - Resource Exhaustion via Unauthenticated MS Teams Webhook Body Parsingthird-party-advisory

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