CVE-2026-30925
Parse Server affected by Regular Expression Denial of Service (ReDoS) via `$regex` query in LiveQuery
Description
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.
INFO
Published Date :
March 10, 2026, 5:40 p.m.
Last Modified :
March 11, 2026, 7:53 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Parse Server to version 9.5.0-alpha.14 or later.
- Update Parse Server to version 8.6.11 or later.
- Disable LiveQuery if unable to update Parse Server.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-30925.
| URL | Resource |
|---|---|
| https://github.com/parse-community/parse-server/releases/tag/8.6.11 | Product Release Notes |
| https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14 | Product Release Notes |
| https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j | Mitigation Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-30925 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-30925
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-30925 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30925 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions from (including) 9.0.0 up to (excluding) 9.5.0 *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha1:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha10:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha2:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha3:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha4:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha5:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha6:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha7:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha8:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha9:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions up to (excluding) 8.6.11 *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha11:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha12:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha13:*:*:*:node.js:*:* Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/8.6.11 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j Types: Mitigation, Patch, Vendor Advisory -
New CVE Received by [email protected]
Mar. 10, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-1333 Added Reference https://github.com/parse-community/parse-server/releases/tag/8.6.11 Added Reference https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14 Added Reference https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j