CVE-2026-121965

Description

Parse Server before 8.6.113 and 9.0.0 before 9.10.6-alpha.5 contains a prototype pollution vulnerability when building objects for Cloud Code triggers and LiveQuery, where a dot notation key whose intermediate segment resolves through an inherited member writes onto a process-wide built-in. Clients with write access to an object in a class with a trigger or LiveQuery can corrupt a built-in function, making unrelated requests fail until restart and denying service to all clients and hosted applications.

References

• https://github.com/parse-community/parse-server/pull/10810
• https://github.com/parse-community/parse-server/pull/10811
• https://github.com/parse-community/parse-server/security/advisories/GHSA-95hp-82c6-25q5
• https://www.vulncheck.com/advisories/parse-server-before-8.6.113-and-9.10.6-alpha.5-prototype-pollution-via-dot-notation-key