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CVE-2026-53841— OpenClaw < 2026.5.12 - Cross-Site Scripting via Unsafe Markdown Links in Exported Session HTML

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 2026.5.12之前版本存在跨站脚本漏洞，该漏洞源于导出的会话HTML保留了不安全的javascript:和data:链接，可能导致攻击者在可信操作员打开导出的文件并激活恶意链接时执行浏览器端脚本。

CVSS 6.1 · Medium EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenClaw OpenClaw < 2026.5.12 affected
2026.5.12 unaffected
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I. Basic Information for CVE-2026-53841

Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.5.12 - Cross-Site Scripting via Unsafe Markdown Links in Exported Session HTML
Source: CVE Program / CVE List V5
Vulnerability Description
OpenClaw before 2026.5.12 contains a cross-site scripting vulnerability in exported session HTML that preserves unsafe javascript: and data: links in generated content. Attackers can execute browser-side scripts if a trusted operator opens the exported file and activates a malicious link.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面属性中脚本转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenClaw 跨站脚本漏洞
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之前版本存在跨站脚本漏洞，该漏洞源于导出的会话HTML保留了不安全的javascript:和data:链接，可能导致攻击者在可信操作员打开导出的文件并激活恶意链接时执行浏览器端脚本。
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 ~ 2026.5.12 -

II. Public POCs for CVE-2026-53841

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III. Intelligence Information for CVE-2026-53841

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Vendor Advisories for CVE-2026-53841 (1)

Other References for CVE-2026-53841 (1)

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

CVE-2026-53843 8.8 HIGH OpenClaw < 2026.5.26 - Node Token Revocation Bypass via Pairing-Scoped Device Session
CVE-2026-53853 8.3 HIGH OpenClaw < 2026.5.12 - Argument Pattern Bypass in Exec Allowlist via Linux and macOS
CVE-2026-53857 8.1 HIGH OpenClaw < 2026.5.3 - Mutable Display Name Binding in Zalo allowFrom Policy
CVE-2026-53864 8.1 HIGH OpenClaw < 2026.5.26 - Insufficient Environment Variable Sanitization in Node.js Control V
CVE-2026-53855 8.1 HIGH OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks
CVE-2026-53849 8.1 HIGH OpenClaw < 2026.5.7 - Privilege Escalation via Mutable Discord Display Names in allowFrom
CVE-2026-53866 8.1 HIGH OpenClaw < 2026.5.12 - Allowlist Bypass in Shell Inline-Command Parsing
CVE-2026-53840 7.1 HIGH OpenClaw < 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirect
CVE-2026-53858 7.1 HIGH OpenClaw < 2026.5.2 - Arbitrary Runtime Dependency Loading via STATE_DIRECTORY Environment
CVE-2026-53865 7.1 HIGH OpenClaw < 2026.5.2 - Arbitrary Command Execution via Workspace-Derived Service PATH
CVE-2026-53846 7.1 HIGH OpenClaw < 2026.4.29 - Arbitrary Package Manager Execution via Workspace .env npm_execpath
CVE-2026-53842 7.1 HIGH OpenClaw < 2026.5.2 - Arbitrary Python Runtime Execution via CLOUDSDK_PYTHON Environment V
CVE-2026-53863 7.1 HIGH OpenClaw < 2026.4.25 - Unvalidated Group ID Acceptance in Tool Group Policy
CVE-2026-53861 6.6 MEDIUM OpenClaw < 2026.5.6 - Allowlist Bypass via Combined POSIX Inline Flags on macOS
CVE-2026-53854 6.5 MEDIUM OpenClaw < 2026.4.25 - Privilege Escalation via ownerAllowFrom Wildcard Inheritance in Int
CVE-2026-53859 6.5 MEDIUM OpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency
CVE-2026-53844 6.5 MEDIUM OpenClaw < 2026.4.29 - Session Visibility Check Bypass in Shared Memory Search
CVE-2026-53856 5.5 MEDIUM OpenClaw 2026.4.23 < 2026.4.24 - Insecure File Permissions in Config Recovery via OpenClaw
CVE-2026-53850 5.5 MEDIUM OpenClaw < 2026.4.25 - Control Scope Enforcement Bypass in Focus Command
CVE-2026-53852 5.4 MEDIUM OpenClaw < 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-83

V. Comments for CVE-2026-53841

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