{"id":52488,"date":"2026-05-08T09:29:53","date_gmt":"2026-05-08T09:29:53","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=52488"},"modified":"2026-05-08T09:29:53","modified_gmt":"2026-05-08T09:29:53","slug":"praisonai-mcp-toolscall-path-traversal-and-rce-via-python-pth-injection","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=52488","title":{"rendered":"PraisonAI MCP `tools\/call` path-traversal and RCE via Python `.pth` injection_CVE-2026-44336"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;PraisonAI is a multi-agent teams system. Prior to version 4.6.34, PraisonAI&#8217;s MCP (Model Context Protocol) server (praisonai mcp serve) registers four file-handling tools by default \u2014 praisonai.rules.create, praisonai.rules.show, praisonai.rules.delete, and praisonai.workflow.show. Each accepts a path or filename string from MCP tools\/call arguments and joins it onto ~\/.praison\/rules\/ (or, for workflow.show, accepts an absolute path) with no containment check. The JSON-RPC dispatcher passes params[\\&#8221;arguments\\&#8221;] blind to each handler via **kwargs without validating against the advertised input schema. By setting rule_name=\\&#8221;..\/..\/\\u003csome-path\\u003e\\&#8221; an attacker walks out of the rules directory and writes any file the running user can write. Dropping a Python .pth file into the user site-packages directory escalates this primitive to arbitrary code execution in any subsequent Python process the user spawns \u2014 the next praisonai CLI invocation, an IDE script run, the user&#8217;s python REPL, or any background Python service. This issue has been patched in version 4.6.34.&#8221;,&#8221;published&#8221;:&#8221;2026-05-08T13:32:33.605Z&#8221;,&#8221;modified&#8221;:&#8221;2026-05-08T13:32:33.605Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;PraisonAI MCP `tools\/call` path-traversal and RCE via Python `.pth` injection&#8221;,&#8221;source&#8221;:&#8221;GitHub_M&#8221;,&#8221;references&#8221;:&#8221;https:\/\/github.com\/MervinPraison\/PraisonAI\/security\/advisories\/GHSA-9mqq-jqxf-grvw&#8221;,&#8221;id&#8221;:&#8221;CVE-2026-44336&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-20&#8243;,&#8221;CWE-22&#8243;,&#8221;CWE-94&#8243;,&#8221;CWE-829&#8243;,&#8221;CWE-913&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;MervinPraison PraisonAI \\u003c 4.6.34&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:9.4,&#8221;severity&#8221;:&#8221;CRITICAL&#8221;,&#8221;vector&#8221;:&#8221;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&#8221;,&#8221;version&#8221;:&#8221;4.0&#8243;},&#8221;cvss2&#8243;:{},&#8221;cvss3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;,&#8221;cvssV3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;}},&#8221;href&#8221;:&#8221;&#8221;,&#8221;category_name&#8221;:&#8221;CVE&#8221;,&#8221;post_link&#8221;:&#8221;&#8221;,&#8221;product&#8221;:&#8221;PraisonAI&#8221;,&#8221;version&#8221;:&#8221;\\u003c 4.6.34&#8243;,&#8221;vendor&#8221;:&#8221;MervinPraison&#8221;,&#8221;ai_description&#8221;:&#8221;Path-traversal and remote code execution vulnerability in PraisonAI MCP server&#8221;,&#8221;ai_severity&#8221;:&#8221;Critical&#8221;,&#8221;ai_vendor&#8221;:&#8221;MervinPraison&#8221;,&#8221;ai_product&#8221;:&#8221;PraisonAI&#8221;,&#8221;ai_version&#8221;:&#8221;\\u003c 4.6.34&#8243;,&#8221;ai_score&#8221;:9.4}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;PraisonAI is a multi-agent teams system. Prior to version 4.6.34, PraisonAI&#8217;s MCP (Model Context Protocol) server (praisonai mcp serve) registers four file-handling tools by default&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[9,6,8,131,12,13,7,11,5],"class_list":["post-52488","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-critical","tag-cve","tag-cvss","tag-cvss-94","tag-exploit","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PraisonAI MCP `tools\/call` path-traversal and RCE via Python `.pth` injection_CVE-2026-44336 - zero redgem<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=52488\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PraisonAI MCP `tools\/call` path-traversal and RCE via Python `.pth` injection_CVE-2026-44336 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;PraisonAI is a multi-agent teams system. 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