CVE-2026-53839— OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation
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团队开源的一个智能人工助理。 OpenClaw 2026.5.7之前版本存在处理逻辑错误漏洞，该漏洞源于重试端点检查中存在主机名验证漏洞，允许匹配主机名前缀而不是确切主机名，攻击者可通过构造与受信任主机相似的主机名前缀，将身份验证材料发送到不受信任的端点。
Possible ATT&CK Techniques 2 AI
T1041 · Exfiltration Over C2 Channel T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2026-53839
Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation
Source: CVE Program / CVE List V5
Vulnerability Description
OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching hostname prefixes instead of exact hostnames. Attackers can exploit this by crafting a hostname prefix resembling a trusted host to send authentication material to untrusted endpoints.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
缺失要素致使对比不完全
Source: CVE Program / CVE List V5
Vulnerability Title
OpenClaw 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenClaw是OpenClaw团队开源的一个智能人工助理。 OpenClaw 2026.5.7之前版本存在处理逻辑错误漏洞，该漏洞源于重试端点检查中存在主机名验证漏洞，允许匹配主机名前缀而不是确切主机名，攻击者可通过构造与受信任主机相似的主机名前缀，将身份验证材料发送到不受信任的端点。
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
II. Public POCs for CVE-2026-53839
| # | POC Description | Source Link | Shenlong Link |
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Vendor Advisories for CVE-2026-53839 (2)
Same Patch Batch · OpenClaw · 2026-06-12 · 20 CVEs total
| CVE-2026-53838 | 9.8 CRITICAL | OpenClaw < 2026.5.27 - Node Pairing State Mutation via Reconnection |
| CVE-2026-53836 | 8.8 HIGH | OpenClaw < 2026.5.12 - Allowlist Bypass via PowerShell Encoded-Command Aliases |
| CVE-2026-53822 | 8.8 HIGH | OpenClaw < 2026.5.18 - Command Argument Modification via Shell Wrapper Between Approval an |
| CVE-2026-53821 | 8.8 HIGH | OpenClaw < 2026.5.18 - Scope Elevation in trusted-proxy Control UI WebSocket |
| CVE-2026-53828 | 8.8 HIGH | OpenClaw < 2026.5.6 - Native Command Authorization Bypass via Owner-Command Enforcement |
| CVE-2026-53831 | 8.3 HIGH | OpenClaw < 2026.5.18 - Arbitrary File Read via Shell Expansion in system.run Safe-bin Allo |
| CVE-2026-53823 | 8.1 HIGH | OpenClaw < 2026.5.3 - Privilege Escalation via Mutable Slack Display Names in allowFrom |
| CVE-2026-53829 | 8.0 HIGH | OpenClaw < 2026.5.18 - Command Truncation in Exec Approval Display |
| CVE-2026-53832 | 7.7 HIGH | OpenClaw < 2026.5.18 - Identity Header Forgery via Trusted-Proxy Configuration |
| CVE-2026-53833 | 7.7 HIGH | QQBot for OpenClaw < 2026.4.29 - Authorization Bypass via QQBot Streaming Command |
| CVE-2026-53834 | 7.5 HIGH | OpenClaw < 2026.4.27 - Authorization Bypass in QQBot Pre-dispatch Slash Commands |
| CVE-2026-53820 | 6.6 MEDIUM | OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn |
| CVE-2026-53830 | 6.5 MEDIUM | OpenClaw < 2026.4.22 - Webhook Secret Revocation Bypass via secrets.reload |
| CVE-2026-53827 | 6.5 MEDIUM | OpenClaw < 2026.5.2 - Credential Exposure via Model-Supplied Loopback URLs in message.acti |
| CVE-2026-53825 | 6.5 MEDIUM | OpenClaw < 2026.4.7 - Arbitrary Local File Read via memory-wiki Ingest with operator.write |
| CVE-2026-53824 | 6.5 MEDIUM | Mattermost plugin for OpenClaw < 2026.4.24 - Slash Token Revocation Lag via Monitor Refres |
| CVE-2026-53826 | 4.3 MEDIUM | OpenClaw < 2026.4.26 - Information Disclosure via Sandboxed Session Spawn |
| CVE-2026-53835 | 4.3 MEDIUM | OpenClaw < 2026.5.6 - Config-Write Enforcement Bypass in Feishu Dynamic-Agent Bindings |
| CVE-2026-53837 | 3.7 LOW | OpenClaw < 2026.5.6 - Missing Channel Type Validation in Mattermost Event Handlers |
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