CVE-2026-45539

{
  "id": "CVE-2026-45539",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-15T17:16:48.887",
  "lastModified": "2026-10-26T14:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft APM is an open-source, community-driven dependency manager for AI agents. From 0.5.4 to 0.12.4, two primitive integrators in apm-cli enumerate package files with bare Path.glob() / Path.rglob() calls and read each match with Path.read_text(), transparently following symbolic links. A symlink committed inside a remote APM dependency under .apm/prompts/<x>.prompt.md or .apm/agents/<x>.agent.md is preserved verbatim into apm_modules/ on clone and then dereferenced during integration, with the resolved content written as a regular file into the project's deploy directories. The package content_hash, the pre-deploy SecurityGate scan, and apm audit do not flag this. The deploy roots are not added to the auto-generated .gitignore, so the resulting files are staged by git add by default. This vulnerability is fixed in 0.13.0."
    },
    {
      "lang": "es",
      "value": "Microsoft APM es un gestor de dependencias de código abierto, impulsado por la comunidad, para agentes de IA. Desde la versión 0.5.4 hasta la 0.12.4, dos integradores primitivos en apm-cli enumeran archivos de paquete con llamadas directas a Path.glob() / Path.rglob() y leen cada coincidencia con Path.read_text(), siguiendo de forma transparente los enlaces simbólicos. Un enlace simbólico (symlink) comprometido dentro de una dependencia APM remota bajo .apm/prompts/[x].prompt.md o .apm/agents/[x].agent.md se conserva literalmente en apm_modules/ al clonar y luego se desreferencia durante la integración, con el contenido resuelto escrito como un archivo regular en los directorios de despliegue del proyecto. El content_hash del paquete, el escaneo SecurityGate previo al despliegue y la auditoría de apm no marcan esto. Las raíces de despliegue no se añaden al .gitignore auto-generado, por lo que los archivos resultantes son preparados por git add por defecto. Esta vulnerabilidad está corregida en la versión 0.13.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "microsoft",
          "product": "apm",
          "versions": [
            {
              "version": ">= 0.5.4, < 0.13.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-15T16:41:16.377667Z",
          "id": "CVE-2026-45539",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        },
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}