CVE-2026-57480: Parse Server: Denial of service via exponential-time processing of deeply nested query operators
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the internal query-traversal helper and block the Node.js event loop. This issue is fixed in versions 9.9.1-alpha.12 and 8.6.82.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Parse Serverto a version that resolves this vulnerability.Fixed in 9.9.1-alpha.12 - Upgrade
Upgrade
Parse Serverto a version that resolves this vulnerability.Fixed in 8.6.82
Event History
Frequently Asked Questions
What is the severity of CVE-2026-57480?
The severity of CVE-2026-57480 is classified as high, with a CVSS score of 8.7.
How do I fix CVE-2026-57480?
To fix CVE-2026-57480, you should upgrade to Parse Server version 9.9.1-alpha.12 or later, or version 8.6.82 or later.
What type of vulnerability is CVE-2026-57480?
CVE-2026-57480 is a Denial of Service (DoS) vulnerability caused by exponential-time processing of deeply nested query operators.
Which software is affected by CVE-2026-57480?
CVE-2026-57480 affects the Parse Server, which is an open-source backend framework that can run on Node.js.
What can an attacker do with CVE-2026-57480?
An attacker can exploit CVE-2026-57480 to create deeply nested queries that lead to prolonged processing times, causing a denial of service.