{"id":47944,"date":"2026-04-19T23:30:38","date_gmt":"2026-04-19T23:30:38","guid":{"rendered":"http:\/\/localhost\/?p=47944"},"modified":"2026-04-19T23:30:38","modified_gmt":"2026-04-19T23:30:38","slug":"langflow-ai-langflow-model-context-protocol-configuration-api-mcpprojectspy-installmcpconfig-injecti","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=47944","title":{"rendered":"langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection_CVE-2026-6599"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was detected in langflow-ai langflow up to 1.8.3. The impacted element is the function get_client_ip\/install_mcp_config of the file src\/backend\/base\/langflow\/api\/v1\/mcp_projects.py of the component Model Context Protocol Configuration API. Performing a manipulation of the argument X-Forwarded-For results in injection. 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The vendor was contacted early about this disclosure but did not respond in any way.&#8221;,&#8221;published&#8221;:&#8221;2026-04-20T03:00:15.645Z&#8221;,&#8221;modified&#8221;:&#8221;2026-04-20T03:00:15.645Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection&#8221;,&#8221;source&#8221;:&#8221;VulDB&#8221;,&#8221;references&#8221;:&#8221;https:\/\/vuldb.com\/vuln\/358234\\nhttps:\/\/vuldb.com\/vuln\/358234\/cti\\nhttps:\/\/vuldb.com\/submit\/791922\\nhttps:\/\/gist.github.com\/chenhouser2025\/a909c47316b7a0948ee68c109ab747a3&#8243;,&#8221;id&#8221;:&#8221;CVE-2026-6599&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-74&#8243;,&#8221;CWE-707&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;langflow-ai langflow 1.8.0\\nlangflow-ai langflow 1.8.1\\nlangflow-ai langflow 1.8.2\\nlangflow-ai langflow 1.8.3&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:5.3,&#8221;severity&#8221;:&#8221;MEDIUM&#8221;,&#8221;vector&#8221;:&#8221;CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:L\/UI:N\/VC:L\/VI:L\/VA:L\/SC:N\/SI:N\/SA:N\/E:P&#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;langflow&#8221;,&#8221;version&#8221;:&#8221;1.8.0&#8243;,&#8221;vendor&#8221;:&#8221;langflow-ai&#8221;,&#8221;ai_description&#8221;:&#8221;&#8221;,&#8221;ai_severity&#8221;:&#8221;&#8221;,&#8221;ai_vendor&#8221;:&#8221;&#8221;,&#8221;ai_product&#8221;:&#8221;&#8221;,&#8221;ai_version&#8221;:&#8221;&#8221;,&#8221;ai_score&#8221;:0}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was detected in langflow-ai langflow up to 1.8.3. The impacted element is the function get_client_ip\/install_mcp_config of the file src\/backend\/base\/langflow\/api\/v1\/mcp_projects.py of the component Model&#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":[6,8,22,12,21,13,7,11,5],"class_list":["post-47944","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-53","tag-exploit","tag-medium","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>langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection_CVE-2026-6599 - 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=47944\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection_CVE-2026-6599 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was detected in langflow-ai langflow up to 1.8.3. 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