Parse Server has a protected fields bypass via dot-notation in query and sort

Description

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.

Recommendation

Update the parse-server package to the latest compatible version. Followings are version details:

• Affected version(s): **< 8.6.32

  >= 9.0.0-alpha.1, < 9.6.0-alpha.6**

• Patched version(s): **8.6.32

  9.6.0-alpha.6**

References

• GHSA-r2m8-pxm9-9c4g
• CVE-2026-31872
• CWE-284
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A6

Related Issues

• Parse Server has a protected fields bypass via logical query operators - CVE-2026-30962
• Parse Server has a protected fields bypass via LiveQuery subscription WHERE clause - CVE-2026-32098
• Parse Server has a query condition depth bypass via pre-validation transform pipeline - CVE-2026-33498
• Parse Server has Denial of Service (DoS) and Cloud Function Dispatch Bypass via Prototype Chain Resolution - CVE-2026-30939

Tags:

npm

parse-server