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CVE-2026-53820— OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn

CVSS 6.6 · Medium EPSS 0.09% · P1

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProductVersion RangeStatus
OpenClawOpenClaw< 2026.5.12affected
2026.5.12unaffected
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I. Basic Information for CVE-2026-53820

Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP session-spawn path to start sessions with broader command reach than intended.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenClaw 授权问题漏洞
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 2026.5.12之前版本存在授权问题漏洞，该漏洞源于bundle MCP loopback session-spawn路径中的exec denylist绕过漏洞，允许经过身份验证的调用者绕过预期的命令限制，攻击者可以访问受影响的捆绑MCP session-spawn路径，启动具有比预期更广泛命令范围的会话。
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 ~ 2026.5.12 -

II. Public POCs for CVE-2026-53820

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III. Intelligence Information for CVE-2026-53820

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Vendor Advisories for CVE-2026-53820 (2)

Same Patch Batch · OpenClaw · 2026-06-12 · 20 CVEs total

CVE-2026-538389.8 CRITICALOpenClaw < 2026.5.27 - Node Pairing State Mutation via Reconnection
CVE-2026-538228.8 HIGHOpenClaw < 2026.5.18 - Command Argument Modification via Shell Wrapper Between Approval an
CVE-2026-538368.8 HIGHOpenClaw < 2026.5.12 - Allowlist Bypass via PowerShell Encoded-Command Aliases
CVE-2026-538218.8 HIGHOpenClaw < 2026.5.18 - Scope Elevation in trusted-proxy Control UI WebSocket
CVE-2026-538288.8 HIGHOpenClaw < 2026.5.6 - Native Command Authorization Bypass via Owner-Command Enforcement
CVE-2026-538318.3 HIGHOpenClaw < 2026.5.18 - Arbitrary File Read via Shell Expansion in system.run Safe-bin Allo
CVE-2026-538238.1 HIGHOpenClaw < 2026.5.3 - Privilege Escalation via Mutable Slack Display Names in allowFrom
CVE-2026-538298.0 HIGHOpenClaw < 2026.5.18 - Command Truncation in Exec Approval Display
CVE-2026-538337.7 HIGHQQBot for OpenClaw < 2026.4.29 - Authorization Bypass via QQBot Streaming Command
CVE-2026-538327.7 HIGHOpenClaw < 2026.5.18 - Identity Header Forgery via Trusted-Proxy Configuration
CVE-2026-538347.5 HIGHOpenClaw < 2026.4.27 - Authorization Bypass in QQBot Pre-dispatch Slash Commands
CVE-2026-538306.5 MEDIUMOpenClaw < 2026.4.22 - Webhook Secret Revocation Bypass via secrets.reload
CVE-2026-538396.5 MEDIUMOpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation
CVE-2026-538276.5 MEDIUMOpenClaw < 2026.5.2 - Credential Exposure via Model-Supplied Loopback URLs in message.acti
CVE-2026-538256.5 MEDIUMOpenClaw < 2026.4.7 - Arbitrary Local File Read via memory-wiki Ingest with operator.write
CVE-2026-538246.5 MEDIUMMattermost plugin for OpenClaw < 2026.4.24 - Slash Token Revocation Lag via Monitor Refres
CVE-2026-538264.3 MEDIUMOpenClaw < 2026.4.26 - Information Disclosure via Sandboxed Session Spawn
CVE-2026-538354.3 MEDIUMOpenClaw < 2026.5.6 - Config-Write Enforcement Bypass in Feishu Dynamic-Agent Bindings
CVE-2026-538373.7 LOWOpenClaw < 2026.5.6 - Missing Channel Type Validation in Mattermost Event Handlers

IV. Related Vulnerabilities

Same product: OpenClaw
Same vendor: OpenClaw
Same weakness: CWE-862

V. Comments for CVE-2026-53820

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