CVE-2026-40112— PraisonAI has Stored XSS via Unsanitized Agent Output in HTML Rendering (nh3 Not a Required Dependency)
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I. Basic Information for CVE-2026-40112
Vulnerability Information
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Vulnerability Title
PraisonAI has Stored XSS via Unsanitized Agent Output in HTML Rendering (nh3 Not a Required Dependency)
Source: NVD (National Vulnerability Database)
Vulnerability Description
PraisonAI is a multi-agent teams system. Prior to 4.5.128, the Flask API endpoint in src/praisonai/api.py renders agent output as HTML without effective sanitization. The _sanitize_html function relies on the nh3 library, which is not listed as a required or optional dependency in pyproject.toml. When nh3 is absent (the default installation), the sanitizer is a no-op that returns HTML unchanged. An attacker who can influence agent input (via RAG data poisoning, web scraping results, or prompt injection) can inject arbitrary JavaScript that executes in the browser of anyone viewing the API output. This vulnerability is fixed in 4.5.128.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
PraisonAI 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PraisonAI是Mervin Praison个人开发者的一个低代码多智能体协作框架。 PraisonAI 4.5.128之前版本存在跨站脚本漏洞，该漏洞源于Flask API端点渲染HTML时清理无效，可能导致攻击者注入任意JavaScript。
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 |
|---|---|---|---|---|
| MervinPraison | PraisonAI | < 4.5.128 | - |
II. Public POCs for CVE-2026-40112
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · MervinPraison · 2026-04-09 · 15 CVEs total
| CVE-2026-40088 | 9.7 CRITICAL | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |
| CVE-2026-40154 | 9.3 CRITICAL | PraisonAI Affected by Untrusted Remote Template Code Execution |
| CVE-2026-40113 | 8.4 HIGH | PraisonAI has an Argument Injection into Cloud Run Environment Variables via Unsanitized C |
| CVE-2026-40149 | 7.9 HIGH | PraisonAI has an Unauthenticated Allow-List Manipulation Bypasses Agent Tool Approval Safe |
| CVE-2026-40150 | 7.7 HIGH | PraisonAIAgents has SSRF and Local File Read via Unvalidated URLs in web_crawl Tool |
| CVE-2026-40116 | 7.5 HIGH | PraisonAI's Unauthenticated WebSocket Endpoint Proxies to Paid OpenAI Realtime API Without |
| CVE-2026-40153 | 7.4 HIGH | PraisonAIAgents Affected by Environment Variable Secret Exfiltration via os.path.expandvar |
| CVE-2026-40114 | 7.2 HIGH | PraisonAI has Server-Side Request Forgery via Unvalidated webhook_url in Jobs API |
| CVE-2026-40148 | 6.5 MEDIUM | PraisonAI Affected by Decompression Bomb DoS via Recipe Bundle Extraction Without Size Lim |
| CVE-2026-40115 | 6.2 MEDIUM | PraisonAI has an Unrestricted Upload Size in WSGI Recipe Registry Server Enables Memory Ex |
| CVE-2026-40117 | 6.2 MEDIUM | PraisonAIAgents Affected by Arbitrary File Read via read_skill_file Missing Workspace Boun |
| CVE-2026-40151 | 5.3 MEDIUM | PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /ap |
| CVE-2026-40152 | 5.3 MEDIUM | PraisonAIAgents has a Path Traversal via Unvalidated Glob Pattern in list_files Bypasses W |
| CVE-2026-40111 | PraisonAIAgents has an OS Command Injection via shell=True in Memory Hooks Executor (memor |
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