FKIE_CVE-2026-30870

Vulnerability from fkie_nvd - Published: 2026-03-10 17:40 - Updated: 2026-04-16 14:45
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
PowerSync Service is the server-side component of the PowerSync sync engine. In version 1.20.0, when using new sync streams with config.edition: 3, certain subquery filters were ignored when determining which data to sync to users. Depending on the sync stream configuration, this could result in authenticated users syncing data that should have been restricted. Only queries that gate synchronization using subqueries without partitioning the result set are affected. This vulnerability is fixed in 1.20.1.
References
security-advisories@github.comhttps://github.com/powersync-ja/powersync-service/security/advisories/GHSA-q6wc-xx4m-92fj
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PowerSync Service is the server-side component of the PowerSync sync engine. In version 1.20.0, when using new sync streams with config.edition: 3, certain subquery filters were ignored when determining which data to sync to users. Depending on the sync stream configuration, this could result in authenticated users syncing data that should have been restricted. Only queries that gate synchronization using subqueries without partitioning the result set are affected. This vulnerability is fixed in 1.20.1."
    },
    {
      "lang": "es",
      "value": "PowerSync Service es el componente del lado del servidor del motor de sincronizaci\u00f3n PowerSync. En la versi\u00f3n 1.20.0, al usar nuevas transmisiones de sincronizaci\u00f3n con config.edition: 3, ciertos filtros de subconsulta fueron ignorados al determinar qu\u00e9 datos sincronizar con los usuarios. Dependiendo de la configuraci\u00f3n de la transmisi\u00f3n de sincronizaci\u00f3n, esto podr\u00eda resultar en que usuarios autenticados sincronicen datos que deber\u00edan haber sido restringidos. Solo las consultas que controlan la sincronizaci\u00f3n usando subconsultas sin particionar el conjunto de resultados se ven afectadas. Esta vulnerabilidad est\u00e1 corregida en la 1.20.1."
    }
  ],
  "id": "CVE-2026-30870",
  "lastModified": "2026-04-16T14:45:19.723",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-10T17:40:14.530",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/powersync-ja/powersync-service/security/advisories/GHSA-q6wc-xx4m-92fj"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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