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CVE-2026-35665— OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing

CVSS 5.3 · Medium EPSS 0.08% · P24
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I. Basic Information for CVE-2026-35665

Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
不对称的资源消耗(放大攻击)
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenClaw 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenClaw是OpenClaw开源的一个智能人工助理。 OpenClaw 2026.3.24之前版本存在安全漏洞，该漏洞源于Feishu webhook处理程序在签名验证前接受具有宽松限制的请求体，可能导致未经身份验证的攻击者通过发送并发慢速HTTP POST请求耗尽服务器连接资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
OpenClawOpenClaw 0 ~ 2026.3.24 -

II. Public POCs for CVE-2026-35665

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III. Intelligence Information for CVE-2026-35665

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Advisory · 2

Same Patch Batch · OpenClaw · 2026-04-10 · 29 CVEs total

CVE-2026-356698.8 HIGHOpenClaw < 2026.3.25 - Privilege Escalation via Gateway Plugin HTTP Authentication Scope
CVE-2026-356438.8 HIGHOpenClaw < 2026.3.22 - Arbitrary Code Execution via Unvalidated WebView JavascriptInterfac
CVE-2026-356638.8 HIGHOpenClaw < 2026.3.25 - Privilege Escalation via Backend Reconnect Scope Self-Claim
CVE-2026-356668.8 HIGHOpenClaw < 2026.3.22 - Allowlist Bypass via Unregistered Time Dispatch Wrapper
CVE-2026-356608.1 HIGHOpenClaw < 2026.3.23 - Insufficient Access Control in Gateway Agent Session Reset
CVE-2026-356538.1 HIGHOpenClaw < 2026.3.24 - Incorrect Authorization in POST /reset-profile via browser.request
CVE-2026-356417.8 HIGHOpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installati
CVE-2026-356687.7 HIGHOpenClaw < 2026.3.24 - Sandbox Media Root Bypass via Unnormalized mediaUrl and fileUrl Par
CVE-2026-356507.5 HIGHOpenClaw < 2026.3.22 - Environment Variable Override Bypass via Inconsistent Sanitization
CVE-2026-356216.5 MEDIUMOpenClaw < 2026.3.24 - Privilege Escalation via chat.send to Allowlist Persistence
CVE-2026-356496.5 MEDIUMOpenClaw < 2026.3.22 - Settings Reconciliation Bypass via Empty Allowlist
CVE-2026-356586.5 MEDIUMOpenClaw < 2026.3.2 - Filesystem Boundary Bypass in Image Tool
CVE-2026-356576.5 MEDIUMOpenClaw < 2026.3.25 - Authorization Bypass in HTTP Session History Route
CVE-2026-356566.5 MEDIUMOpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limi
CVE-2026-356526.5 MEDIUMOpenClaw < 2026.3.22 - Unauthorized Action Execution via Callback Dispatch
CVE-2026-356676.1 MEDIUMOpenClaw < 2026.3.24 - Improper Process Termination via Unpatched killProcessTree in shell
CVE-2026-356705.9 MEDIUMOpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat
CVE-2026-356555.7 MEDIUMOpenClaw < 2026.3.22 - Identity Spoofing via rawInput Tool in ACP Permission Resolution
CVE-2026-356205.4 MEDIUMOpenClaw < 2026.3.24 - Missing Authorization in /send and /allowlist Chat Commands
CVE-2026-356545.3 MEDIUMOpenClaw < 2026.3.25 - Authorization Bypass in Microsoft Teams Feedback Invoke

Showing top 20 of 29 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: OpenClaw
Same vendor: OpenClaw
Same weakness: CWE-405

V. Comments for CVE-2026-35665

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