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CVE-2026-40157— PraisonAI affected by arbitrary file write via path traversal in `praisonai recipe unpack`

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 4.5.128之前版本存在路径遍历漏洞，该漏洞源于recipe CLI解压.praison归档时未验证路径，可能导致任意文件覆盖。

AI Predicted 8.8 Difficulty: Easy EPSS 0.38% · P31
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I. Basic Information for CVE-2026-40157

Vulnerability Information
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Vulnerability Title
PraisonAI affected by arbitrary file write via path traversal in `praisonai recipe unpack`
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI is a multi-agent teams system. Prior to 4.5.128, cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write files outside the intended output directory. An attacker who distributes a malicious bundle can overwrite arbitrary files on the victim's filesystem when they run praisonai recipe unpack. This vulnerability is fixed in 4.5.128.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
PraisonAI 路径遍历漏洞
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之前版本存在路径遍历漏洞，该漏洞源于recipe CLI解压.praison归档时未验证路径，可能导致任意文件覆盖。
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-2026-40157

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III. Intelligence Information for CVE-2026-40157

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Vendor Advisories for CVE-2026-40157 (1)

Same Patch Batch · MervinPraison · 2026-04-10 · 5 CVEs total

CVE-2026-40158 8.6 HIGH PraisonAI has Improper Control of Generation of Code ('Code Injection') and Protection Mec
CVE-2026-40156 7.8 HIGH PraisonAI Affected by Implicit Execution of Arbitrary Code via Automatic `tools.py` Loadin
CVE-2026-40159 5.5 MEDIUM PraisonAI Exposes Sensitive Environment Variable via Untrusted MCP Subprocess Execution
CVE-2026-40160 PraisonAIAgents has SSRF via unvalidated URL in `web_crawl` httpx fallback

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-22

V. Comments for CVE-2026-40157

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