CVE-2026-30820

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.0.13)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Flowise", "source": "cna", "vendor": "FlowiseAI"}, "product": "flowise", "vendor": "flowiseai"}], "analysis": {"en": {"generated_at": "2026-04-16T11:03:54.239634+00:00", "value": {"mitigation_remediation": ["Upgrade Flowise to version 3.0.13 or later, which removes the trust of spoofed x\u2011request\u2011from headers.", "If upgrading is not immediately feasible, configure the application or reverse\u2011proxy to reject or strip the x\u2011request\u2011from header from external requests, ensuring it can only be set internally.", "Review and enforce strict authorization checks on all /api/v1/ endpoints, confirming that no future releases allow bypass based on header values."], "summary": {"action": "Apply Patch", "impact": "Privilege Escalation"}, "threat_synthesis": {"affected_systems": "All installations of Flowise by FlowiseAI prior to version 3.0.13. The vulnerability affects the Flowise product regardless of deployment environment, as the header check is performed internally within the application.", "description_and_impact": "Flowise, a drag\u2011and\u2011drop interface for building custom large language model flows, had a flaw that allowed any client setting the HTTP header x\u2011request\u2011from to \"internal\" to bypass all /api/v1/ authorization checks. Because an authenticated tenant session stores a browser cookie, a low\u2011privilege user could set that header and invoke internal administrative endpoints such as API key management, credential stores, and custom function execution, effectively escalating privileges. The CWE identified is 863 \u2013 Change Authentication Setting.", "risk_and_exploitability": "The CVSS v3 score is 8.7, indicating a high level of severity. The EPSS score is less than 1\u202f%, suggesting that exploitation is unlikely but not impossible. The vulnerability is not listed in the CISA KEV catalog. Attackers would need to authenticate to obtain a valid session cookie; the x\u2011request\u2011from header can then be spoofed in HTTP requests. The likely attack vector is remote via the web interface or API; the necessary prerequisites are access to any authenticated tenant session and the ability to manipulate HTTP headers, which are common capabilities for users with browser or API client access."}}}}, "created": "2026-03-09T10:05:58.957804+00:00", "updated": "2026-04-16T11:15:27.676797+00:00", "vendors": ["flowiseai", "flowiseai$PRODUCT$flowise"]}