CVE-2026-39891— PraisonAI has a Template Injection in Agent Tool Definitions
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-39891
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
PraisonAI has a Template Injection in Agent Tool Definitions
Source: NVD (National Vulnerability Database)
Vulnerability Description
PraisonAI is a multi-agent teams system. Prior to 4.5.115, the create_agent_centric_tools() function returns tools (like acp_create_file) that process file content using template rendering. When user input from agent.start() is passed directly into these tools without escaping, template expressions in the input are executed rather than treated as literal text. This vulnerability is fixed in 4.5.115.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
PraisonAI 代码注入漏洞
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 4.5.115之前版本存在代码注入漏洞，该漏洞源于用户输入未转义，可能导致模板表达式执行。
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 | < 4.5.115 | - |
II. Public POCs for CVE-2026-39891
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-39891
请登录查看更多情报信息。
Same Patch Batch · MervinPraison · 2026-04-08 · 4 CVEs total
| CVE-2026-39888 | 10.0 CRITICAL | PraisonAIAgents has a sandbox escape via exception frame traversal in `execute_code` (subp |
| CVE-2026-39890 | 9.8 CRITICAL | PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition L |
| CVE-2026-39889 | 7.5 HIGH | PraisonAI has Unauthenticated SSE Event Stream Exposes All Agent Activity in A2U Server |
IV. Related Vulnerabilities
Same product: PraisonAI
- CVE-2026-44340
PraisonAI: Symlink-extraction bypass of `_safe_extractall` w - CVE-2026-44339
PraisonAI has unsafe tool resolution in `ToolExecutionMixin. - CVE-2026-44338
PraisonAI ships and generates a legacy API server with authe - CVE-2026-44337
PraisonAI knowledge-store backends interpolate unvalidated c - CVE-2026-44336
PraisonAI MCP `tools/call` path-traversal and RCE via Python
Same vendor: MervinPraison
- CVE-2026-44340
PraisonAI: Symlink-extraction bypass of `_safe_extractall` w - CVE-2026-44339
PraisonAI has unsafe tool resolution in `ToolExecutionMixin. - CVE-2026-44338
PraisonAI ships and generates a legacy API server with authe - CVE-2026-44337
PraisonAI knowledge-store backends interpolate unvalidated c - CVE-2026-44336
PraisonAI MCP `tools/call` path-traversal and RCE via Python
Same weakness: CWE-94
- CVE-2021-47939
Evolution CMS 3.1.6 Authenticated Remote Code Execution via - CVE-2021-47938
ImpressCMS 1.4.2 Remote Code Execution via Autotasks - CVE-2021-47935
Sentry 8.2.0 Remote Code Execution via Pickle Deserializatio - CVE-2022-50944
Aero CMS 0.0.1 PHP Code Injection via posts.php - CVE-2026-8211
codelibs Fess JSP File AdminDesignAction.java update code in
V. Comments for CVE-2026-39891
No comments yet