CVE-2026-39844

{"id": "CVE-2026-39844", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39844", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-09T14:55:44.846577Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "zauberzeug", "product": "nicegui", "versions": [{"status": "affected", "version": "< 3.10.0"}]}]}], "published": "2026-04-08T21:16:59.883", "references": [{"url": "https://github.com/zauberzeug/nicegui/commit/d38a702e3af2da5b0708f689be8d71413fc77056", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.10.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-w8wv-vfpc-hw2w", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "NiceGUI is a Python-based UI framework. Prior to 3.10.0, Since PurePosixPath only recognizes forward slashes (/) as path separators, an attacker can bypass this sanitization on Windows by using backslashes (\\) in the upload filename. Applications that construct file paths using file.name (a pattern demonstrated in NiceGUI's bundled examples) are vulnerable to arbitrary file write on Windows. This vulnerability is fixed in 3.10.0."}, {"lang": "es", "value": "NiceGUI es un framework de UI basado en Python. Antes de la versi\u00f3n 3.10.0, dado que PurePosixPath solo reconoce las barras diagonales (/) como separadores de ruta, un atacante puede eludir esta sanitizaci\u00f3n en Windows utilizando barras invertidas (\\) en el nombre de archivo de la carga. Las aplicaciones que construyen rutas de archivo utilizando file.name (un patr\u00f3n demostrado en los ejemplos incluidos de NiceGUI) son vulnerables a la escritura arbitraria de archivos en Windows. Esta vulnerabilidad se corrigi\u00f3 en la versi\u00f3n 3.10.0."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1266F97-4CD4-4117-8666-9D5179E4B030", "versionEndExcluding": "3.10.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security-advisories@github.com"}