CVE-2026-35446
LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 24.0.0 to before 27.0.3 and 28.0.1, an incorrect order of operations in the FilesDownloadHandler could result in an attacker escaping the intended download directories. This vulnerability is fixed in 27.0.3 and 28.0.1.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Puntuación base: 8.6
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.38%
- Percentil entre todas las CVEs puntuadas: 30
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access90 % - Impacto principal
T1005Data from Local Systemcollection85 % - Impacto secundario
T1552Unsecured Credentialscredential access75 %
AV:N/PR:N/UI:N indica explotación remota sin privilegios (T1190). CWE-552 y escape de directorio permite leer archivos fuera del alcance previsto (T1005, T1552: acceso a datos y secretos almacenados).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-552
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-35446",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-35446",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-08T20:13:39.534396Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 7.7,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 4,
"exploitabilityScore": 3.1
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 8.6,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 4,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "security-advisories@github.com",
"affectedData": [
{
"vendor": "aces",
"product": "Loris",
"versions": [
{
"status": "affected",
"version": ">= 24.0.0, < 27.0.3"
},
{
"status": "affected",
"version": ">= 28.0.0, < 28.0.1"
}
]
}
]
}
],
"published": "2026-04-08T19:25:24.217",
"references": [
{
"url": "https://github.com/aces/Loris/security/advisories/GHSA-47jj-7xfg-8759",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "security-advisories@github.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"description": [
{
"lang": "en",
"value": "CWE-552"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 24.0.0 to before 27.0.3 and 28.0.1, an incorrect order of operations in the FilesDownloadHandler could result in an attacker escaping the intended download directories. This vulnerability is fixed in 27.0.3 and 28.0.1."
},
{
"lang": "es",
"value": "LORIS (Longitudinal Online Research and Imaging System) es una aplicación web autoalojada que proporciona gestión de datos y proyectos para la investigación en neuroimagen. Desde la versión 24.0.0 hasta antes de la 27.0.3 y la 28.0.1, un orden incorrecto de operaciones en el FilesDownloadHandler podría resultar en que un atacante escape de los directorios de descarga previstos. Esta vulnerabilidad está corregida en 27.0.3 y 28.0.1."
}
],
"lastModified": "2026-07-24T21:10:00.143",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "54A016B3-10EE-475A-AE81-B2B651F4F3B0",
"versionEndIncluding": "27.0.2",
"versionStartIncluding": "24.0.0"
},
{
"criteria": "cpe:2.3:a:mcgill:loris:28.0.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D358B66A-04AC-44F2-8EF6-4332D8AC00F4"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security-advisories@github.com"
}