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CVE-2026-53840— OpenClaw < 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirects

CVSS 7.1 · High EPSS 0.22% · P13

Affected Version Matrix 2

VendorProductVersion RangeStatus
OpenClawOpenClaw< 2026.5.12affected
2026.5.12unaffected
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I. Basic Information for CVE-2026-53840

Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirects
Source: CVE Program / CVE List V5
Vulnerability Description
OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers like API keys or tenant-routing credentials to attacker-controlled origins.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
OpenClaw 信任管理问题漏洞
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之前版本存在信任管理问题漏洞，该漏洞源于在跨域重定向期间转发运营商配置的自定义标头，可能导致控制或破坏MCP端点的攻击者通过重定向请求来窃取API密钥或租户路由凭据等敏感标头。
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-2026-53840

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III. Intelligence Information for CVE-2026-53840

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Vendor Advisories for CVE-2026-53840 (2)

Same Patch Batch · OpenClaw · 2026-06-16 · 27 CVEs total

CVE-2026-538438.8 HIGHOpenClaw < 2026.5.26 - Node Token Revocation Bypass via Pairing-Scoped Device Session
CVE-2026-538538.3 HIGHOpenClaw < 2026.5.12 - Argument Pattern Bypass in Exec Allowlist via Linux and macOS
CVE-2026-538578.1 HIGHOpenClaw < 2026.5.3 - Mutable Display Name Binding in Zalo allowFrom Policy
CVE-2026-538648.1 HIGHOpenClaw < 2026.5.26 - Insufficient Environment Variable Sanitization in Node.js Control V
CVE-2026-538558.1 HIGHOpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks
CVE-2026-538498.1 HIGHOpenClaw < 2026.5.7 - Privilege Escalation via Mutable Discord Display Names in allowFrom
CVE-2026-538668.1 HIGHOpenClaw < 2026.5.12 - Allowlist Bypass in Shell Inline-Command Parsing
CVE-2026-538587.1 HIGHOpenClaw < 2026.5.2 - Arbitrary Runtime Dependency Loading via STATE_DIRECTORY Environment
CVE-2026-538657.1 HIGHOpenClaw < 2026.5.2 - Arbitrary Command Execution via Workspace-Derived Service PATH
CVE-2026-538467.1 HIGHOpenClaw < 2026.4.29 - Arbitrary Package Manager Execution via Workspace .env npm_execpath
CVE-2026-538427.1 HIGHOpenClaw < 2026.5.2 - Arbitrary Python Runtime Execution via CLOUDSDK_PYTHON Environment V
CVE-2026-538637.1 HIGHOpenClaw < 2026.4.25 - Unvalidated Group ID Acceptance in Tool Group Policy
CVE-2026-538616.6 MEDIUMOpenClaw < 2026.5.6 - Allowlist Bypass via Combined POSIX Inline Flags on macOS
CVE-2026-538546.5 MEDIUMOpenClaw < 2026.4.25 - Privilege Escalation via ownerAllowFrom Wildcard Inheritance in Int
CVE-2026-538596.5 MEDIUMOpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency
CVE-2026-538446.5 MEDIUMOpenClaw < 2026.4.29 - Session Visibility Check Bypass in Shared Memory Search
CVE-2026-538416.1 MEDIUMOpenClaw < 2026.5.12 - Cross-Site Scripting via Unsafe Markdown Links in Exported Session
CVE-2026-538565.5 MEDIUMOpenClaw 2026.4.23 < 2026.4.24 - Insecure File Permissions in Config Recovery via OpenClaw
CVE-2026-538505.5 MEDIUMOpenClaw < 2026.4.25 - Control Scope Enforcement Bypass in Focus Command
CVE-2026-538525.4 MEDIUMOpenClaw < 2026.4.25 - Scope Bypass via Empty-Scope Device Re-pairing

Showing top 20 of 27 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: OpenClaw
Same vendor: OpenClaw
Same weakness: CWE-522

V. Comments for CVE-2026-53840

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