CVE-2026-33332

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With large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service. This issue has been patched in version 3.9.0."}, {"lang": "es", "value": "NiceGUI es un framework de UI basado en Python. Antes de la versi\u00f3n 3.9.0, las rutas de medios app.add_media_file() y app.add_media_files() de NiceGUI aceptan un par\u00e1metro de consulta controlado por el usuario que influye en c\u00f3mo se leen los archivos durante la transmisi\u00f3n. El par\u00e1metro se pasa a la implementaci\u00f3n de respuesta de rango sin validaci\u00f3n, permitiendo a un atacante eludir la transmisi\u00f3n por bloques y forzar al servidor a cargar archivos completos en la memoria de una sola vez. Con archivos multimedia grandes y solicitudes concurrentes, esto puede llevar a un consumo excesivo de memoria, un rendimiento degradado o denegaci\u00f3n de servicio. Este problema ha sido parcheado en la versi\u00f3n 3.9.0."}], "id": "CVE-2026-33332", "lastModified": "2026-06-17T10:37:20.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33332", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-25T16:19:01.793986Z", "version": "2.0.3"}}]}, "published": "2026-03-24T20:16:28.743", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/zauberzeug/nicegui/commit/9026962b8c4f3f225c98b2fbc35aa6b60cb3495b"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.9.0"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-w5g8-5849-vj76"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.9.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nicegui", "source": "cna", "vendor": "zauberzeug"}, "product": "nicegui", "vendor": "zauberzeug"}], "analysis": {"en": {"generated_at": "2026-03-26T16:39:18.847229+00:00", "value": {"mitigation_remediation": ["Update NiceGUI to version 3.9.0 or later, which removes the unvalidated chunk size parameter.", "If an update is not immediately feasible, restrict public access to the media routes, or place a reverse proxy or firewall rule that limits or blocks requests to those endpoints, thereby preventing the vulnerability from being exercised."], "summary": {"action": "Immediate Patch", "impact": "Memory Exhaustion Leading to Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the zauberzeug NiceGUI framework. All releases older than 3.9.0 are impacted. The issue was fixed in the 3.9.0 release and is absent from subsequent versions.", "description_and_impact": "NiceGUI is a Python\u2011based UI framework whose media routes allow a user\u2011controlled query parameter to influence file streaming. Prior to version 3.9.0 this parameter is forwarded to the range\u2011response logic without validation, enabling an attacker to bypass chunked streaming and force the server to load entire media files into memory. The resulting excessive memory usage can degrade performance or trigger a denial of service.", "risk_and_exploitability": "The CVSS score of 6.9 indicates a moderate severity, while an EPSS score of less than 1% suggests a low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog. It can be exploited by sending HTTP requests to publicly exposed media routes with a crafted query parameter that forces the server to read full files into memory, which may exhaust RAM and disrupt service."}}}}, "created": "2026-03-25T11:46:17.675178+00:00", "updated": "2026-03-27T09:20:37.239244+00:00", "vendors": ["zauberzeug", "zauberzeug$PRODUCT$nicegui"]}