SB2026040779 - Prototype pollution in Parse Server

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Main Vulnerability Database SB2026040779

SB2026040779 - Prototype pollution in Parse Server

Published: April 7, 2026

Security Bulletin ID SB2026040779
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Prototype pollution (CVE-ID: CVE-2026-30939)

CWE-ID: CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes (\'Prototype Pollution\')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improperly controlled modification of object prototype attributes in the Cloud Function endpoint dispatch logic when handling a Cloud Function request with a prototype property name as the function name. A remote attacker can send a specially crafted request to cause a denial of service.

Requests using other prototype property names or dot-notation traversal may bypass Cloud Function dispatch validation and return HTTP 200 responses even when no such Cloud Functions are defined.


Remediation

Install update from vendor's website.

References