FKIE_CVE-2026-25641

Vulnerability from fkie_nvd - Published: 2026-02-06 20:16 - Updated: 2026-02-18 14:01
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.0 (Critical) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Summary
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, there is a sandbox escape vulnerability due to a mismatch between the key on which the validation is performed and the key used for accessing properties. Even though the key used in property accesses is annotated as string, this is never enforced. So, attackers can pass malicious objects that coerce to different string values when used, e.g., one for the time the key is sanitized using hasOwnProperty(key) and a different one for when the key is used for the actual property access. This vulnerability is fixed in 0.8.29.
References
security-advisories@github.comhttps://github.com/nyariv/SandboxJS/blob/6103d7147c4666fe48cfda58a4d5f37005b43754/src/executor.ts#L304-L304Product
security-advisories@github.comhttps://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3Patch
security-advisories@github.comhttps://github.com/nyariv/SandboxJS/security/advisories/GHSA-7x3h-rm86-3342Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/nyariv/SandboxJS/security/advisories/GHSA-7x3h-rm86-3342Exploit, Vendor Advisory
Impacted products
Vendor Product Version
nyariv sandboxjs *
To clipboard 

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    {
      "nodes": [
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              "criteria": "cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "5822AD4C-2C8E-4196-9149-A626F0572E05",
              "versionEndExcluding": "0.8.29",
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, there is a sandbox escape vulnerability due to a mismatch between the key on which the validation is performed and the key used for accessing properties. Even though the key used in property accesses is annotated as string, this is never enforced. So, attackers can pass malicious objects that coerce to different string values when used, e.g., one for the time the key is sanitized using hasOwnProperty(key) and a different one for when the key is used for the actual property access. This vulnerability is fixed in 0.8.29."
    },
    {
      "lang": "es",
      "value": "SandboxJS es una librer\u00eda de sandboxing de JavaScript. Antes de 0.8.29, existe una vulnerabilidad de escape de sandbox debido a una discrepancia entre la clave sobre la que se realiza la validaci\u00f3n y la clave utilizada para acceder a las propiedades. Aunque la clave utilizada en los accesos a propiedades est\u00e1 anotada como string, esto nunca se aplica. As\u00ed, los atacantes pueden pasar objetos maliciosos que se convierten a diferentes valores de string cuando se usan, por ejemplo, uno para el momento en que la clave se sanea usando hasOwnProperty(key) y uno diferente para cuando la clave se usa para el acceso real a la propiedad. Esta vulnerabilidad est\u00e1 corregida en 0.8.29."
    }
  ],
  "id": "CVE-2026-25641",
  "lastModified": "2026-02-18T14:01:02.337",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
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          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "scope": "CHANGED",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
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          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
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          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
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        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-02-06T20:16:11.263",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-367"
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      "source": "security-advisories@github.com",
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}


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