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CVE-2026-35628— OpenClaw < 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting

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 2026.3.25之前版本存在安全漏洞，该漏洞源于Telegram Webhook身份验证缺少速率限制，可能导致暴力破解攻击。

CVSS 4.8 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenClaw OpenClaw < 2026.3.25 affected
2026.3.25 unaffected
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I. Basic Information for CVE-2026-35628

Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting
Source: CVE Program / CVE List V5
Vulnerability Description
OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
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 2026.3.25之前版本存在安全漏洞，该漏洞源于Telegram Webhook身份验证缺少速率限制，可能导致暴力破解攻击。
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 ~ 2026.3.25 -

II. Public POCs for CVE-2026-35628

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III. Intelligence Information for CVE-2026-35628

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Patches & Fixes for CVE-2026-35628 (1)

Same Patch Batch · OpenClaw · 2026-04-09 · 25 CVEs total

CVE-2026-35638 8.8 HIGH OpenClaw < 2026.3.22 - Privilege Escalation via Self-Declared Scopes in Trusted-Proxy Cont
CVE-2026-35639 8.8 HIGH OpenClaw < 2026.3.22 - Privilege Escalation via device.pair.approve Scope Validation
CVE-2026-35645 8.1 HIGH OpenClaw < 2026.3.25 - Privilege Escalation via Synthetic operator.admin in deleteSession
CVE-2026-34512 8.1 HIGH OpenClaw < 2026.3.25 - Improper Access Control in /sessions/:sessionKey/kill Endpoint
CVE-2026-35625 7.8 HIGH OpenClaw < 2026.3.25 - Privilege Escalation via Silent Local Shared-Auth Reconnect
CVE-2026-35629 7.4 HIGH OpenClaw < 2026.3.25 - Server-Side Request Forgery via Unguarded Configured Base URLs in C
CVE-2026-35637 7.3 HIGH OpenClaw < 2026.3.22 - Premature Cite Expansion Before Authorization in Channel and DM
CVE-2026-35632 7.1 HIGH OpenClaw <= 2026.2.22 - Symlink Traversal via IDENTITY.md appendFile in agents.create/upda
CVE-2026-35644 6.5 MEDIUM OpenClaw < 2026.3.22 - Credential Exposure via baseUrl Fields in Gateway Snapshots
CVE-2026-35636 6.5 MEDIUM OpenClaw 2026.3.11 < 2026.3.25 - Session Isolation Bypass via sessionId Resolution
CVE-2026-35631 6.5 MEDIUM OpenClaw < 2026.3.22 - Missing Authorization Enforcement in Internal ACP Chat Commands
CVE-2026-35627 6.5 MEDIUM OpenClaw < 2026.3.22 - Unauthenticated Cryptographic Work in Nostr Inbound DM Handling
CVE-2026-35618 6.5 MEDIUM OpenClaw < 2026.3.23 - Replay Identity Drift via Query-Only Variants in Plivo V2 Verificat
CVE-2026-35622 5.9 MEDIUM OpenClaw < 2026.3.22 - Improper Authentication Verification in Google Chat Webhook
CVE-2026-35640 5.3 MEDIUM OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing
CVE-2026-35633 5.3 MEDIUM OpenClaw < 2026.3.22 - Unbounded Memory Allocation via Remote Media Error Responses
CVE-2026-35626 5.3 MEDIUM OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook
CVE-2026-35634 5.1 MEDIUM OpenClaw < 2026.3.23 - Authentication Bypass via Local-Direct Requests in Canvas Gateway
CVE-2026-35646 4.8 MEDIUM OpenClaw < 2026.3.25 - Pre-Authentication Rate-Limit Bypass in Webhook Token Validation
CVE-2026-35623 4.8 MEDIUM OpenClaw < 2026.3.25 - Brute-Force Attack via Missing Webhook Password Rate Limiting

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: OpenClaw
Same vendor: OpenClaw
Same weakness: CWE-307

V. Comments for CVE-2026-35628

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