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CVE-2026-23957

Estado: AnalizadaAlta (7.5)—

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.

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 de red sin autenticación (AV:N/PR:N) indica explotación remota directa. CWE-770 y descripción de sobrecarga de procesamiento en deserialización sugieren DoS algorithmic.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Lxsmnsyc — Seroval

CWE

Referencias

JSON original (NVD)

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          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-01-22T18:56:07.994475Z"
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          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
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        "exploitabilityScore": 3.9
      }
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      "source": "security-advisories@github.com",
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        {
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  "published": "2026-01-22T02:15:52.470",
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    },
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    }
  ],
  "lastModified": "2026-06-17T10:22:21.077",
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