CVE-2026-108360
PhpSpreadsheet es una biblioteca PHP pura para leer y escribir archivos de hojas de cálculo. Antes de las versiones 1.30.7, 2.1.19, 2.4.8, 3.10.8 y 5.10.0, Worksheet\Drawing::setPath solo valida la URL inicial de la imagen externa con setIsWhitelisted cuando setAllowExternalImages está habilitado. El contexto de flujo HTTP permite a PHP seguir una redirección sin aplicar la función de retrollamada a la URL redirigida, por lo que un host de imágenes permitido puede redirigir al servidor a una dirección interna y provocar una solicitud GET a ciegas.
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El cuerpo de la respuesta no se devuelve al atacante, porque el lector valida el contenido descargado como imagen y elimina el archivo temporal, pero es posible alcanzar endpoints internos accesibles mediante GET, la accesibilidad de la red y los endpoints de metadatos de la nube. Este problema se ha corregido en las versiones 1.30.7, 2.1.19, 2.4.8, 3.10.8 y 5.10.0.
Traducción automática del texto original de NVD (en inglés).
CVSS
- Puntuación base
- 6.4
- Versión
- 3.1
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días
- 0.22 %
- Percentil entre todas las CVEs puntuadas
- 12
- Fecha de la puntuación
- 23/10/2026
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
T1210Exploitation of Remote Serviceslateral movement80 % - Impacto principal
T1090Proxycommand and control85 %
El vector AV:N/PR:L/UI:N exige privilegios y el texto describe una redirección que lleva a GET ciego a direcciones internas y metadatos cloud, es decir, SSRF.
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-863, CWE-918
Referencias
Mostrar las 11 referencias
- https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66
- https://github.com/PHPOffice/PhpSpreadsheet/commit/94590951d76a250a5fc1ecf69a0b3f7439a9af49
- https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738
- https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9
- https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c
- https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7
- https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19
- https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8
- https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8
- https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0
- https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-2phh-27fw-q4gc
JSON original (NVD)
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{
"id": "CVE-2026-108360",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 6.4,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 3.1
}
]
},
"affected": [
{
"source": "security-advisories@github.com",
"affectedData": [
{
"vendor": "PHPOffice",
"product": "PhpSpreadsheet",
"versions": [
{
"status": "affected",
"version": "< 1.30.7"
},
{
"status": "affected",
"version": ">= 2.0.0, < 2.1.19"
},
{
"status": "affected",
"version": ">= 2.2.0, < 2.4.8"
},
{
"status": "affected",
"version": ">= 3.3.0, < 3.10.8"
},
{
"status": "affected",
"version": ">= 4.0.0, < 5.10.0"
}
]
}
]
}
],
"published": "2026-10-22T18:17:26.897",
"references": [
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/94590951d76a250a5fc1ecf69a0b3f7439a9af49",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-2phh-27fw-q4gc",
"source": "security-advisories@github.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Primary",
"source": "security-advisories@github.com",
"description": [
{
"lang": "en",
"value": "CWE-863"
},
{
"lang": "en",
"value": "CWE-918"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0, Worksheet\\Drawing::setPath validates only the initial external-image URL with setIsWhitelisted when setAllowExternalImages is enabled. The HTTP stream context permits PHP to follow a redirect without applying the callback to the redirected URL, so a permitted image host can redirect the server to an internal address and cause a blind GET request. The response body is not returned to the attacker because the reader validates the downloaded content as an image and removes the temporary file, but internal GET-driven endpoints, network reachability, and cloud metadata endpoints may be reached. This issue is fixed in versions 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0."
}
],
"lastModified": "2026-10-23T19:42:24.553",
"sourceIdentifier": "security-advisories@github.com"
}