{"cve":"CVE-2026-30870","nvd":{"published":"2026-03-10T17:40:14.530","modified":"2026-06-17T10:33:03.807","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-285"],"references":["https://github.com/powersync-ja/powersync-service/security/advisories/GHSA-q6wc-xx4m-92fj"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-30870","score":0.00213,"percentile":0.11628,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-q6wc-xx4m-92fj","url":"https://osv.dev/vulnerability/GHSA-q6wc-xx4m-92fj","summary":"PowerSync: Some sync filters ignored on 1.20.0 using `config.edition: 3`","modified":"2026-03-23T17:46:21.630794Z","packages":[{"ecosystem":"npm","name":"@powersync/service-core","purl":"pkg:npm/%40powersync/service-core","ranges":[">=1.20.0 <1.20.1"],"fixed":["1.20.1"]},{"ecosystem":"npm","name":"@powersync/service-sync-rules","purl":"pkg:npm/%40powersync/service-sync-rules","ranges":[">=0.32.0 <0.33.0"],"fixed":["0.33.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}