Resource Exhaustion Vulnerability in OpenClaw Affected by Malicious MS Teams Webhook Payloads
CVE-2026-41405

8.7HIGH

Key Information:

Vendor

Openclaw

Status
Openclaw
Vendor
CVE Published:
28 April 2026

What is CVE-2026-41405?

Before version 2026.3.31, OpenClaw fails to properly validate JWTs for MS Teams webhook requests prior to parsing, enabling unauthenticated attackers to send crafted payloads. This oversight can lead to resource exhaustion on the server, allowing remote attackers to manipulate server resources significantly.

Affected Version(s)

OpenClaw 0 < 2026.3.31

OpenClaw 2026.3.31

References

https://github.com/openclaw/openclaw/security/advisories/...
vendor-advisory
https://github.com/openclaw/openclaw/commit/3834d47099dd1...
patch
https://www.vulncheck.com/advisories/openclaw-resource-ex...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AntAISecurityLab
.