CVE-2026-30870 | THREATINT

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.

PUBLISHED Reserved 2026-03-06 | Published 2026-03-09 | Updated 2026-03-10 | Assigner GitHub_M

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

CWE-285: Improper Authorization

Product status

< 1.20.1

affected

< 1.20.1

affected

< 0.33.0

affected

References

github.com/...ervice/security/advisories/GHSA-q6wc-xx4m-92fj

cve.org (CVE-2026-30870)

nvd.nist.gov (CVE-2026-30870)

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