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CVE-2026-72696

Estado: AplazadaAlta (8.6)—

Grav CMS before 2.0.16 contains a symlink following vulnerability in Scheduler Job::createLockFile() that allows local attackers to overwrite arbitrary files by pre-creating symlinks at predictable lock file paths in the world-writable temp directory. Attackers can place a symlink at the predictable lock path pointing to any file the web server process can write to, and the next scheduled job run will follow the symlink and overwrite the target file's content with the job ID string.

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.

Vector AV:L sin UI/PR indica acceso local sin interacción. CWE-59 (symlink following) permite escalada/manipulación local. Atacante puede sobrescribir archivos arbitrarios via symlinks predecibles en directorio temporal, logrando modificación de datos y potencial escalada de privilegios del proceso

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

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageExecution PreventionEncrypt Sensitive InformationApplication Isolation and Sandboxing

Tecnologías afectadas (1)

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

Getgrav — GravAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-72696",
  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2026-72696",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-08-27T14:51:36.772362Z"
        }
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
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      }
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    "cvssMetricV40": [
      {
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          "Safety": "NOT_DEFINED",
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          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/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",
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          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
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          "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"
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  },
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      "affectedData": [
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          "product": "grav",
          "versions": [
            {
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              "versionType": "semver"
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  "published": "2026-08-25T02:16:45.253",
  "references": [
    {
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-q8w8-6cq5-j4h2",
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    },
    {
      "url": "https://www.vulncheck.com/advisories/grav-cms-before-symlink-following-via-createlockfile",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-q8w8-6cq5-j4h2",
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    {
      "lang": "en",
      "value": "Grav CMS before 2.0.16 contains a symlink following vulnerability in Scheduler Job::createLockFile() that allows local attackers to overwrite arbitrary files by pre-creating symlinks at predictable lock file paths in the world-writable temp directory. Attackers can place a symlink at the predictable lock path pointing to any file the web server process can write to, and the next scheduled job run will follow the symlink and overwrite the target file's content with the job ID string."
    }
  ],
  "lastModified": "2026-08-31T20:52:56.343",
  "sourceIdentifier": "disclosure@vulncheck.com"
}