Medium severity6.5NVD Advisory· Published Mar 10, 2026· Updated Apr 16, 2026
CVE-2026-30870
CVE-2026-30870
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@powersync/service-corenpm | >= 1.20.0, < 1.20.1 | 1.20.1 |
@powersync/service-sync-rulesnpm | >= 0.32.0, < 0.33.0 | 0.33.0 |
Affected products
2- ghsa-coords2 versions
>= 1.20.0, < 1.20.1+ 1 more
- (no CPE)range: >= 1.20.0, < 1.20.1
- (no CPE)range: >= 0.32.0, < 0.33.0
Patches
Vulnerability mechanics
References
3News mentions
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