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CVE-2026-82531

Estado: Pendiente de análisisCrítica (9.2)—

Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.

CVSS

Probabilidad de explotación (EPSS)

FIRST aún no ha puntuado esta CVE (habitual en CVEs muy recientes o rechazadas).

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.

Vulnerabilidad en aplicación web remota (Smarty) sin requerir autenticación (PR:N, UI:N); inyección de código PHP que se ejecuta en la regeneración del cache. CWE-94 (code injection) confirma T1059.

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 ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (1)

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

Smarty — SmartyAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-82531",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-82531",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-10-06T12:44:36.819504Z"
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    "cvssMetricV31": [
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        "cvssData": {
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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    "cvssMetricV40": [
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        "type": "Secondary",
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        "cvssData": {
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "affectedData": [
        {
          "repo": "https://github.com/smarty-php/smarty",
          "vendor": "smarty-php",
          "product": "smarty",
          "versions": [
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              "version": "0",
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          "packageURL": "pkg:composer/smarty/smarty",
          "defaultStatus": "unaffected"
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  "published": "2026-10-06T13:16:50.180",
  "references": [
    {
      "url": "https://github.com/smarty-php/smarty/commit/1cba51cb813563eb61d963c83d28cd59f26b858d",
      "source": "disclosure@vulncheck.com"
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      "url": "https://github.com/smarty-php/smarty/releases/tag/v5.8.5",
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      "source": "disclosure@vulncheck.com"
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      "url": "https://www.vulncheck.com/advisories/smarty-before-4.5.8-and-5-x-before-5.8.5-php-code-injection-via-extends-inheritance-cache",
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution."
    }
  ],
  "lastModified": "2026-10-06T16:00:36.547",
  "sourceIdentifier": "disclosure@vulncheck.com"
}