CVE-2026-119569
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Parse Server Prototype Pollution Vulnerability

Publication date: 2026-10-30

Last updated on: 2026-10-30

Assigner: VulnCheck

Description
Parse Server before 8.6.108 and 9.0.0 before 9.10.5-alpha.9 contains a prototype pollution vulnerability because user-controlled keys are expanded into objects without own-property checks. Clients with class write access can send dot notation field keys or ACL entry names matching built-in object members to corrupt built-in functions, causing all requests to fail until server restart.

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Meta Information

Published
2026-10-30
Last Modified
2026-10-30
Generated
2026-10-30
AI Q&A
2026-10-30
EPSS Evaluated
N/A
NVD
CVE-2026-119569
EUVD
EUVD-2026-113923

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
parse-community parse-server 9.0.0
parse-community parse-server 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1321 The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

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Executive Summary

Parse Server versions before 8.6.108 and 9.0.0 before 9.10.5-alpha.9 have a prototype pollution flaw. User-controlled keys are expanded into objects without proper checks. Attackers with class write access can use dot notation or ACL entries matching built-in object members to corrupt functions, causing all requests to fail until the server restarts.

Impact Analysis

This vulnerability can lead to denial of service by crashing the server. It may also allow unauthorized access or data manipulation if attackers exploit the corrupted functions to alter server behavior or bypass security controls.

Mitigation Strategies

Immediately upgrade Parse Server to version 8.6.108 or later for the 8.x branch, or to version 9.10.5-alpha.9 or later for the 9.x branch to address the prototype pollution vulnerability.

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