CVE-2026-30870 (GCVE-0-2026-30870)
Vulnerability from cvelistv5 – Published: 2026-03-09 22:31 – Updated: 2026-03-10 14:14
VLAI
EPSS
VEX
Title
Some sync filters in PowerSync Service ignored using `config.edition: 3`
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-10 14:14 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/powersync-ja/powersync-service… | x_refsource_CONFIRM |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| powersync-ja | powersync-service |
Affected:
< 1.20.1
|
|
| @powersync | service-core |
Affected:
< 1.20.1
|
|
| @powersync | service-sync-rules |
Affected:
< 0.33.0
|
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