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CVE-2026-26984

Estado: AnalizadaAlta (8.8)—

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to versions 26.0.5, 27.0.2, and 28.0.0, an authenticated user with sufficient privileges can exploit a path traversal vulnerability to upload a malicious file to an arbitrary location on the server. Once uploaded, the file can be used to achieve remote code execution (RCE). An attacker must be authenticated and have the appropriate permissions to exploit this issue.

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If the server is configured as read-only, remote code execution (RCE) is not possible; however, the malicious file upload may still be achievable. This problem is fixed in LORIS v26.0.5 and above, v27.0.2 and above, and v28.0.0 and above. As a workaround, LORIS administrators can disable the media module if it is not being used.

CVSS

Probabilidad de explotación (EPSS)

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.

AV:N/PR:L requiere autenticación y acceso remoto (T1210). Path traversal + file upload permite web shell (T1505.003) y RCE confirmado en descripción. T1005 secundario por acceso a datos del servidor en contexto de LORIS.

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

Disable or Remove Feature or ProgramPrivileged Account ManagementVulnerability ScanningUser Account ManagementThreat Intelligence ProgramRestrict Web-Based Content

Tecnologías afectadas (1)

Mcgill — Loris

CWE

Referencias

JSON original (NVD)

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      "value": "LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to versions 26.0.5, 27.0.2, and 28.0.0, an authenticated user with sufficient privileges can exploit a path traversal vulnerability to upload a malicious file to an arbitrary location on the server. Once uploaded, the file can be used to achieve remote code execution (RCE). An attacker must be authenticated and have the appropriate permissions to exploit this issue. If the server is configured as read-only, remote code execution (RCE) is not possible; however, the malicious file upload may still be achievable. This problem is fixed in LORIS v26.0.5 and above, v27.0.2 and above, and v28.0.0 and above. As a workaround, LORIS administrators can disable the media module if it is not being used."
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      "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. Antes de las versiones 26.0.5, 27.0.2 y 28.0.0, un usuario autenticado con privilegios suficientes puede explotar una vulnerabilidad de salto de ruta para cargar un archivo malicioso en una ubicación arbitraria en el servidor. Una vez cargado, el archivo puede usarse para lograr la ejecución remota de código (RCE). Un atacante debe estar autenticado y tener los permisos apropiados para explotar este problema. Si el servidor está configurado como de solo lectura, la ejecución remota de código (RCE) no es posible; sin embargo, la carga del archivo malicioso aún puede ser factible. Este problema está solucionado en LORIS v26.0.5 y superiores, v27.0.2 y superiores, y v28.0.0 y superiores. Como solución alternativa, los administradores de LORIS pueden deshabilitar el módulo de medios si no se está utilizando."
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  "lastModified": "2026-06-17T10:26:29.217",
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