CVE-2026-11431

Estado: Pendiente de análisisAlta (8.3)—

A path traversal vulnerability exists in the Projects Service download endpoint shared by Altium Enterprise Server and Altium 365. An authenticated user can supply a crafted path parameter that bypasses validation, allowing arbitrary files (including entire directories returned as archives) to be read from the server filesystem.

Because the readable files include service configuration and credential material, exploitation can be used to gather information enabling further compromise. The issue can be combined with CVE-2026-11424 to reach the cloud-side endpoint.

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On multi-tenant Altium 365 deployments, the readable configuration could have exposed credentials shared across services. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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
Puntuación base: 8.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.52%
Percentil entre todas las CVEs puntuadas: 42
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement85 %
Impacto principalT1005 Data from Local Systemcollection90 %
Impacto secundarioT1552 Unsecured Credentialscredential access85 %

AV:N/PR:L indica acceso remoto autenticado (T1210). El path traversal permite leer archivos arbitrarios del servidor (T1005) incluyendo credenciales (T1552), según describe el texto.

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

Privileged Account Management Update Software Active Directory Configuration Vulnerability Scanning User Training Threat Intelligence Program

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Altium — 365^AI Altium — Enterprise Server^AI

CWE

CWE-22, CWE-200

Referencias

https://www.altium.com/platform/security-compliance/security-advisories

JSON original (NVD)

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{
  "id": "CVE-2026-11431",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-11431",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-08T13:12:24.668997Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 8.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
      "affectedData": [
        {
          "vendor": "Altium",
          "modules": [
            "Projects Service (DownloadReleaseNode action)"
          ],
          "product": "Altium Enterprise Server",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "8.1.1",
              "versionType": "semver"
            }
          ],
          "platforms": [
            "Web"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Altium",
          "modules": [
            "Projects Service (DownloadReleaseNode action)"
          ],
          "product": "Altium 365",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ],
          "platforms": [
            "Web"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-06-05T22:16:47.650",
  "references": [
    {
      "url": "https://www.altium.com/platform/security-compliance/security-advisories",
      "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
      "description": [
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          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A path traversal vulnerability exists in the Projects Service download endpoint shared by Altium Enterprise Server and Altium 365. An authenticated user can supply a crafted path parameter that bypasses validation, allowing arbitrary files (including entire directories returned as archives) to be read from the server filesystem.\n\n\n\n\nBecause the readable files include service configuration and credential material, exploitation can be used to gather information enabling further compromise. The issue can be combined with CVE-2026-11424 to reach the cloud-side endpoint. On multi-tenant Altium 365 deployments, the readable configuration could have exposed credentials shared across services. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de salto de ruta existe en el endpoint de descarga del Servicio de Proyectos compartido por Altium Enterprise Server y Altium 365. Un usuario autenticado puede proporcionar un parámetro de ruta manipulado que omite la validación, permitiendo que archivos arbitrarios (incluyendo directorios completos devueltos como archivos) sean leídos del sistema de archivos del servidor.\n\nDebido a que los archivos legibles incluyen configuración del servicio y material de credenciales, la explotación puede ser utilizada para recopilar información que permita un compromiso adicional. El problema puede combinarse con CVE-2026-11424 para alcanzar el endpoint del lado de la nube. En implementaciones multi-inquilino de Altium 365, la configuración legible podría haber expuesto credenciales compartidas entre servicios. Altium Enterprise Server está corregido en 8.1.1; el problema ha sido remediado en Altium 365 a nivel de servicio."
    }
  ],
  "lastModified": "2026-07-23T07:10:00.113",
  "sourceIdentifier": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79"
}