Parse Server vulnerable to schema poisoning via prototype pollution in deep copy

Description

An attacker can bypass the default request keyword denylist protection and the class-level permission for adding fields by sending a crafted request that exploits prototype pollution in the deep copy mechanism.

Recommendation

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

• Affected version(s): **< 8.6.44

  >= 9.0.0, < 9.6.0-alpha.20**

• Patched version(s): **8.6.44

  9.6.0-alpha.20**

References

• GHSA-9ccr-fpp6-78qf
• CVE-2026-32878
• CWE-1321
• CAPEC-310
• OWASP 2021-A6

Related Issues

• Parse Server is vulnerable to Prototype Pollution via Cloud Code Webhooks - CVE-2022-41879
• Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution - CVE-2023-36475
• Parse Server vulnerable to Prototype Pollution via Cloud Code Webhooks or Cloud Code Triggers - CVE-2022-41878
• Parse Server vulnerable to SQL Injection via dot-notation sub-key name in `Increment` operation on PostgreSQL - CVE-2026-31871

Tags:

npm

parse-server