FKIE_CVE-2026-32770

Vulnerability from fkie_nvd - Published: 2026-03-18 22:16 - Updated: 2026-03-19 17:32
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients. The fix in 9.6.0-alpha.19 and 8.6.43 validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process. As a workaround, disable LiveQuery if it is not needed.
References
security-advisories@github.comhttps://github.com/parse-community/parse-server/pull/10197Issue Tracking
security-advisories@github.comhttps://github.com/parse-community/parse-server/pull/10199Issue Tracking
security-advisories@github.comhttps://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86cVendor Advisory
Impacted products
Vendor Product Version
parseplatform parse-server *
parseplatform parse-server *
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients. The fix in 9.6.0-alpha.19 and 8.6.43 validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process. As a workaround, disable LiveQuery if it is not needed."
    },
    {
      "lang": "es",
      "value": "Parse Server es un backend de c\u00f3digo abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de 9.6.0-alpha.19 y 8.6.43, un atacante remoto puede provocar la ca\u00edda del Parse Server al suscribirse a un LiveQuery con un patr\u00f3n de expresi\u00f3n regular inv\u00e1lido. El proceso del servidor termina cuando el patr\u00f3n inv\u00e1lido llega al motor de expresiones regulares durante la coincidencia de suscripci\u00f3n, causando denegaci\u00f3n de servicio para todos los clientes conectados. La correcci\u00f3n en 9.6.0-alpha.19 y 8.6.43 valida los patrones de expresiones regulares en el momento de la suscripci\u00f3n, rechazando patrones inv\u00e1lidos antes de que sean almacenados. Adem\u00e1s, un try-catch de defensa en profundidad evita que cualquier error de coincidencia de suscripci\u00f3n provoque la ca\u00edda del proceso del servidor. Como soluci\u00f3n alternativa, deshabilite LiveQuery si no es necesario."
    }
  ],
  "id": "CVE-2026-32770",
  "lastModified": "2026-03-19T17:32:00.403",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
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          "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-18T22:16:25.343",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/parse-community/parse-server/pull/10197"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/parse-community/parse-server/pull/10199"
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    {
      "source": "security-advisories@github.com",
      "tags": [
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-248"
        }
      ],
      "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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