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CVE-2026-121965Parse Server before 8.6.113 and 9.10.6-alpha.5 Prototype Pollution via Dot Notation Key
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.
6.0 MEDIUMEPSS 0.41%Not in KEVNVD: Awaiting Analysis
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.0 | MEDIUM | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 5.3 | MEDIUM | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
Details
- CVE ID
- CVE-2026-121965
- Status
- Awaiting Analysis
- Assigner (CNA)
- VulnCheck
- Published
- Nov 4, 2026
- Last modified
- 2026-11-04 19:17 UTC
- Weaknesses
- CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Products
As published by the CNA in the CVE record.
parse-communityparse-server1 version range
- 9.0.0 before 9.10.6-alpha.5
parse-communityparse-server1 version range
- before 8.6.113
References
- github.com https://github.com/parse-community/parse-server/pull/10810
- github.com https://github.com/parse-community/parse-server/pull/10811
- github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-95hp-82c6-25q5
- vulncheck.com https://www.vulncheck.com/advisories/parse-server-before-8.6.113-and-9.10.6-alpha.5-prototype-pollution-via-dot-notation-key