FKIE_CVE-2026-23897

Vulnerability from fkie_nvd - Published: 2026-02-04 20:16 - Updated: 2026-02-05 14:57
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Apollo Server is an open-source, spec-compliant GraphQL server that's compatible with any GraphQL client, including Apollo Client. In versions from 2.0.0 to 3.13.0, 4.2.0 to before 4.13.0, and 5.0.0 to before 5.4.0, the default configuration of startStandaloneServer from @apollo/server/standalone is vulnerable to denial of service (DoS) attacks through specially crafted request bodies with exotic character set encodings. This issue does not affect users that use @apollo/server as a dependency for integration packages, like @as-integrations/express5 or @as-integrations/next, only direct usage of startStandaloneServer.
References
security-advisories@github.comhttps://github.com/apollographql/apollo-server/commit/d25a5bdc377826ad424fcf7f8d1d062055911643
security-advisories@github.comhttps://github.com/apollographql/apollo-server/commit/e9d49d163a86b8a33be56ed27c494b9acd5400a4
security-advisories@github.comhttps://github.com/apollographql/apollo-server/security/advisories/GHSA-mp6q-xf9x-fwf7
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apollo Server is an open-source, spec-compliant GraphQL server that\u0027s compatible with any GraphQL client, including Apollo Client. In versions from 2.0.0 to 3.13.0, 4.2.0 to before 4.13.0, and 5.0.0 to before 5.4.0, the default configuration of startStandaloneServer from @apollo/server/standalone is vulnerable to denial of service (DoS) attacks through specially crafted request bodies with exotic character set encodings. This issue does not affect users that use @apollo/server as a dependency for integration packages, like @as-integrations/express5 or @as-integrations/next, only direct usage of startStandaloneServer."
    },
    {
      "lang": "es",
      "value": "Apollo Server es un servidor GraphQL de c\u00f3digo abierto, compatible con especificaciones, que es compatible con cualquier cliente GraphQL, incluyendo Apollo Client. En las versiones de 2.0.0 a 3.13.0, de 4.2.0 a antes de 4.13.0, y de 5.0.0 a antes de 5.4.0, la configuraci\u00f3n predeterminada de startStandaloneServer de @apollo/server/standalone es vulnerable a ataques de denegaci\u00f3n de servicio (DoS) a trav\u00e9s de cuerpos de solicitud especialmente dise\u00f1ados con codificaciones de conjuntos de caracteres ex\u00f3ticas. Este problema no afecta a los usuarios que usan @apollo/server como dependencia para paquetes de integraci\u00f3n, como @as-integrations/express5 o @as-integrations/next, solo el uso directo de startStandaloneServer."
    }
  ],
  "id": "CVE-2026-23897",
  "lastModified": "2026-02-05T14:57:20.563",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-04T20:16:05.130",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apollographql/apollo-server/commit/d25a5bdc377826ad424fcf7f8d1d062055911643"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apollographql/apollo-server/commit/e9d49d163a86b8a33be56ed27c494b9acd5400a4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apollographql/apollo-server/security/advisories/GHSA-mp6q-xf9x-fwf7"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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