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CVE-2026-34936— PraisonAI: SSRF via Unvalidated api_base in passthrough() Fallback

Quick assessment

Affected
MervinPraison PraisonAI
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.

PraisonAI是Mervin Praison个人开发者的一个低代码多智能体协作框架。 PraisonAI 4.5.90之前版本存在安全漏洞，该漏洞源于passthrough和apassthrough函数接受调用者控制的api_base参数，未经URL方案验证、私有IP过滤或域名白名单检查即发送请求，可能导致服务端请求伪造。

CVSS 7.7 · High EPSS 0.35% · P27
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I. Basic Information for CVE-2026-34936

Vulnerability Information
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Vulnerability Title
PraisonAI: SSRF via Unvalidated api_base in passthrough() Fallback
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI is a multi-agent teams system. Prior to version 4.5.90, passthrough() and apassthrough() in praisonai accept a caller-controlled api_base parameter that is concatenated with endpoint and passed directly to httpx.Client.request() when the litellm primary path raises AttributeError. No URL scheme validation, private IP filtering, or domain allowlist is applied, allowing requests to any host reachable from the server. This issue has been patched in version 4.5.90.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
PraisonAI 安全漏洞
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 4.5.90之前版本存在安全漏洞，该漏洞源于passthrough和apassthrough函数接受调用者控制的api_base参数，未经URL方案验证、私有IP过滤或域名白名单检查即发送请求，可能导致服务端请求伪造。
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 < 4.5.90 -

II. Public POCs for CVE-2026-34936

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III. Intelligence Information for CVE-2026-34936

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Vendor Advisories for CVE-2026-34936 (1)

Same Patch Batch · MervinPraison · 2026-04-03 · 10 CVEs total

CVE-2026-34938 10.0 CRITICAL PraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code
CVE-2026-34934 9.8 CRITICAL PraisonAI: Second-Order SQL Injection in `get_all_user_threads`
CVE-2026-34935 9.8 CRITICAL PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()
CVE-2026-34952 9.1 CRITICAL PraisonAI: Missing Authentication in WebSocket Gateway
CVE-2026-34953 9.1 CRITICAL PraisonAI: Authentication Bypass in OAuthManager.validate_token()
CVE-2026-34955 8.8 HIGH PraisonAI: Sandbox Escape via shell=True and Bypassable Blocklist in SubprocessSandbox
CVE-2026-34954 8.6 HIGH PraisonAI: SSRF in FileTools.download_file() via Unvalidated URL
CVE-2026-34937 7.8 HIGH PraisonAI: Shell Injection in run_python() via Unescaped $() Substitution
CVE-2026-34939 6.5 MEDIUM PraisonAI: ReDoS via Unvalidated User-Controlled Regex in MCPToolIndex.search_tools()

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-918

V. Comments for CVE-2026-34936

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