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BIT-parse-2026-31872 — Parse Server has a protected fields bypass via dot-notation in query and sort

2026-10-15T15:28:17.417687+00:00

Affected: Bitnami: parse

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0 and 8.6.32, the protectedFields class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. This vulnerability is fixed in 9.6.0 and 8.6.32.

EUVD-2026-275901

2026-10-15T15:28:17.417738+00:00

EUVD-2026-275901

fkie_cve-2026-31872

2026-10-15T15:28:17.417754+00:00

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.6 and 8.6.32, the protectedFields class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. This vulnerability is fixed in 9.6.0-alpha.6 and 8.6.32.

GHSA-r2m8-pxm9-9c4g — Parse Server has a protected fields bypass via dot-notation in query and sort

2026-10-15T15:28:17.417778+00:00

Affected: npm: parse-server

### Impact

The `protectedFields` class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values.

This affects both MongoDB and PostgreSQL deployments.

### Patches

The fix ensures that query WHERE clause keys and sort keys are checked against protected fields by extracting the root field from dot-notation paths. For example, a query on `secretObj.apiKey` is now correctly blocked when `secretObj` is a protected field.

### Workarounds

None.

### References

- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.32