CVE-2026-41405

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

Published Apr 28, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-p464-m8x6-vhv8 OpenClaw: MS Teams webhook parses body before JWT validation, enabling unauthenticated resource exhaustion
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title OpenClaw < 2026.3.31 - Resource Exhaustion via Unauthenticated MS Teams Webhook Body Parsing
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-408
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Apr 29, 2026, 12:16 PM
Reserved
Apr 20, 2026, 2:15 PM
Status
Analyzed
Published
Apr 28, 2026, 7:37 PM
Modified
Nov 11, 2026, 9:10 PM