Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

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

Quick assessment

Affected
OpenClaw OpenClaw
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 5.3 · Medium EPSS 0.46% · P38

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenClaw OpenClaw < 2026.3.24 affected
2026.3.24 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-35665

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不对称的资源消耗(放大攻击)
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
OpenClaw OpenClaw 0 ~ 2026.3.24 -

II. Public POCs for CVE-2026-35665

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-35665

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-35665 (2)

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

CVE-2026-35669 8.8 HIGH OpenClaw < 2026.3.25 - Privilege Escalation via Gateway Plugin HTTP Authentication Scope
CVE-2026-35643 8.8 HIGH OpenClaw < 2026.3.22 - Arbitrary Code Execution via Unvalidated WebView JavascriptInterfac
CVE-2026-35663 8.8 HIGH OpenClaw < 2026.3.25 - Privilege Escalation via Backend Reconnect Scope Self-Claim
CVE-2026-35666 8.8 HIGH OpenClaw < 2026.3.22 - Allowlist Bypass via Unregistered Time Dispatch Wrapper
CVE-2026-35660 8.1 HIGH OpenClaw < 2026.3.23 - Insufficient Access Control in Gateway Agent Session Reset
CVE-2026-35653 8.1 HIGH OpenClaw < 2026.3.24 - Incorrect Authorization in POST /reset-profile via browser.request
CVE-2026-35641 7.8 HIGH OpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installati
CVE-2026-35668 7.7 HIGH OpenClaw < 2026.3.24 - Sandbox Media Root Bypass via Unnormalized mediaUrl and fileUrl Par
CVE-2026-35650 7.5 HIGH OpenClaw < 2026.3.22 - Environment Variable Override Bypass via Inconsistent Sanitization
CVE-2026-35621 6.5 MEDIUM OpenClaw < 2026.3.24 - Privilege Escalation via chat.send to Allowlist Persistence
CVE-2026-35649 6.5 MEDIUM OpenClaw < 2026.3.22 - Settings Reconciliation Bypass via Empty Allowlist
CVE-2026-35658 6.5 MEDIUM OpenClaw < 2026.3.2 - Filesystem Boundary Bypass in Image Tool
CVE-2026-35657 6.5 MEDIUM OpenClaw < 2026.3.25 - Authorization Bypass in HTTP Session History Route
CVE-2026-35656 6.5 MEDIUM OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limi
CVE-2026-35652 6.5 MEDIUM OpenClaw < 2026.3.22 - Unauthorized Action Execution via Callback Dispatch
CVE-2026-35667 6.1 MEDIUM OpenClaw < 2026.3.24 - Improper Process Termination via Unpatched killProcessTree in shell
CVE-2026-35670 5.9 MEDIUM OpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat
CVE-2026-35655 5.7 MEDIUM OpenClaw < 2026.3.22 - Identity Spoofing via rawInput Tool in ACP Permission Resolution
CVE-2026-35620 5.4 MEDIUM OpenClaw < 2026.3.24 - Missing Authorization in /send and /allowlist Chat Commands
CVE-2026-35654 5.3 MEDIUM OpenClaw < 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

No comments yet

Leave a comment