CVE-2026-119569

Medium

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.

SeverityMedium

CVSS5.3

Exploit probability—

ProductParse-community Parse-server

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-1321Prototype pollution

How to fix

Update

parse-community parse-server9.10.5-alpha.9, 8.6.108 or later

Vendor advisories

github.com/parse-community/parse-server/security/advisories/GHSA-rx55-fw4j-pvpx

Affected products

Product	Affected versions	Fixed in
parse-community parse-server	9.0.0 ≤ v < 9.10.5-alpha.9, v < 8.6.108	9.10.5-alpha.9, 8.6.108

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