CVE-2026-30870
Some sync filters in PowerSync Service ignored using `config.edition: 3`
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-285 |
| Vendor | powersync-ja |
| Product | powersync-service |
| Published | Mar 9, 2026 |
| Last Updated | Mar 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
powersync-ja / powersync-service
< 1.20.1
@powersync / service-core
< 1.20.1
@powersync / service-sync-rules
< 0.33.0