FKIE_CVE-2026-23737

Vulnerability from fkie_nvd - Published: 2026-01-21 23:15 - Updated: 2026-02-27 19:31
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0.
References
security-advisories@github.comhttps://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060Patch
security-advisories@github.comhttps://github.com/lxsmnsyc/seroval/security/advisories/GHSA-3rxj-6cgf-8cfwVendor Advisory
Impacted products
Vendor Product Version
lxsmnsyc seroval *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:lxsmnsyc:seroval:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "85760E40-9AB1-40EB-98A1-D1A4411AAFC5",
              "versionEndExcluding": "1.4.1",
              "vulnerable": true
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0."
    },
    {
      "lang": "es",
      "value": "seroval facilita la serializaci\u00f3n de valores JS, incluyendo estructuras complejas m\u00e1s all\u00e1 de las capacidades de JSON.stringify. En las versiones 1.4.0 e inferiores, un manejo inadecuado de la entrada en el componente de deserializaci\u00f3n JSON puede llevar a la ejecuci\u00f3n arbitraria de c\u00f3digo JavaScript. Es posible explotarlo mediante la anulaci\u00f3n de la deserializaci\u00f3n de valores constantes y errores, permitiendo el acceso indirecto a la evaluaci\u00f3n JS insegura. Como m\u00ednimo, los atacantes necesitan la capacidad de realizar 4 solicitudes separadas en la misma funci\u00f3n, y un conocimiento parcial de c\u00f3mo se utilizan los datos serializados durante el procesamiento posterior en tiempo de ejecuci\u00f3n. Esta vulnerabilidad afecta a las funciones fromJSON y fromCrossJSON en un escenario de transmisi\u00f3n de cliente a servidor. Este problema ha sido solucionado en la versi\u00f3n 1.4.0."
    }
  ],
  "id": "CVE-2026-23737",
  "lastModified": "2026-02-27T19:31:57.527",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-21T23:15:52.493",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      ],
      "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-3rxj-6cgf-8cfw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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