Node.js CVE-2026-30925
HIGH
GHSA-mf3j-86qx-cq5j
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionGitHub Advisory
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.0-alpha.14 and 8.6.11, a malicious client can subscribe to a LiveQuery with a crafted $regex pattern that causes catastrophic backtracking, blocking the Node.js event loop. This makes the entire Parse Server unresponsive, affecting all clients. Any Parse Server deployment with LiveQuery enabled is affected. The attacker only needs the application ID and JavaScript key, both of which are public in client-side apps. This only affects LiveQuery subscription matching, which evaluates regex in JavaScript on the Node.js event loop. Normal REST and GraphQL queries are not affected because their regex is evaluated by the database engine. This vulnerability is fixed in 9.5.0-alpha.14 and 8.6.11.
AnalysisAI
Parse Server's LiveQuery feature is vulnerable to denial of service through malicious regex patterns that trigger catastrophic backtracking, freezing the Node.js event loop and rendering the entire server unresponsive to all clients. Attackers only require the publicly available application ID and JavaScript key to exploit this vulnerability on any Parse Server with LiveQuery enabled. Updates to versions 9.5.0-alpha.14 or 8.6.11 and later address this issue.
Technical ContextAI
This vulnerability (CWE-1333: Inefficient Regular Expression Complexity (ReDoS)) affects Parse-Server. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.0-alpha.14 and 8.6.11, a malicious client can subscribe to a LiveQuery with a crafted $regex pattern that causes catastrophic backtracking, blocking the Node.js event loop. This makes the entire Parse Server unresponsive, affecting all clients. Any Parse Server deployment with LiveQuery enabled is affected. The attacker only needs the application ID and JavaScript key, both of whi
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 9.5.0. Restrict network access to the affected service where possible.
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External POC / Exploit Code
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