Parse Server leaks protected fields via LiveQuery afterEvent trigger

Description

When a Parse.Cloud.afterLiveQueryEvent trigger is registered for a class, the LiveQuery server leaks protected fields and authData to all subscribers of that class. Fields configured as protected via Class-Level Permissions (protectedFields) are included in LiveQuery event payloads for all event types (create, update, delete, enter, leave).

Recommendation

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

• Affected version(s): **< 8.6.50

  >= 9.0.0, < 9.6.0-alpha.35**

• Patched version(s): **8.6.50

  9.6.0-alpha.35**

References

• GHSA-5hmj-jcgp-6hff
• CVE-2026-33163
• CWE-200
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A6

Related Issues

• Parse Server has a protected fields bypass via LiveQuery subscription WHERE clause - CVE-2026-32098
• Parse Server has a protected fields bypass via dot-notation in query and sort - CVE-2026-31872
• Parse Server has a protected fields bypass via logical query operators - CVE-2026-30962
• Parse Server has a protected field change detection oracle via LiveQuery watch parameter - CVE-2026-33429

Tags:

npm

parse-server