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7.8

Parse Server can crash from crafted client data

CVE-2026-119569 · published 5 days ago
Summary

The open‑source Parse Server (versions before 9.10.5‑alpha.9) lets specially crafted requests modify internal JavaScript objects. This can corrupt essential functions, causing the server to stop responding until it is restarted. Update to the latest version of Parse Server as soon as possible to prevent the outage.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
parse-community parse-server < 9.10.5-alpha.9
< 8.6.108
Original advisory text
Parse Server 9.0.0 before 9.10.5-alpha.9 Prototype Pollution Denial of Service
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
7.8 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-1321Prototype Pollution
Timeline
Published30 Oct 2026
Updated4 Nov 2026
First seen30 Oct 2026
Sources
CVE-2026-119569 · NVD
CVE-2026-119569 · MITRE
CVE-2026-119569 · OSV
GHSA-rx55-fw4j-pvpx · GHSA
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