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CVE-2026-86544

Estado: AplazadaAlta (7.2)—

knowns versions before 0.30.0 contain an authorization bypass vulnerability where mutating code actions are incorrectly classified as read-only operations. Attackers with read-restricted sessions can exploit code.replace to modify permission configurations and escalate privileges on subsequent calls.

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.

AV:N/PR:L/UI:N indica acceso de red con privilegios limitados sin interacción (T1210). El bypass autorización permite escalar privilegios y obtener acceso a cuentas/permisos (T1078, T1068) mediante code.replace en sesiones restringidas.

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 ProgramPrivileged Account ManagementApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer Guidance

CWE

Referencias

JSON original (NVD)

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  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-86544",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "no"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-09-09T14:53:12.549589Z"
        }
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    "cvssMetricV31": [
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    "cvssMetricV40": [
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          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "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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  "affected": [
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      "affectedData": [
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          "versions": [
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              "versionType": "semver"
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          "packageURL": "pkg:npm/knowns",
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  ],
  "published": "2026-09-07T23:16:54.303",
  "references": [
    {
      "url": "https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/permissions/guard.go#L44-L60",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/permissions/registry.go#L99-L140",
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      "source": "disclosure@vulncheck.com"
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      "url": "https://github.com/knowns-dev/knowns/releases/tag/v0.30.0",
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      "url": "https://github.com/knowns-dev/knowns/security/advisories/GHSA-w323-3wpx-f7g5",
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      "value": "knowns versions before 0.30.0 contain an authorization bypass vulnerability where mutating code actions are incorrectly classified as read-only operations. Attackers with read-restricted sessions can exploit code.replace to modify permission configurations and escalate privileges on subsequent calls."
    }
  ],
  "lastModified": "2026-09-09T15:17:18.617",
  "sourceIdentifier": "disclosure@vulncheck.com"
}