Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-30925

Parse Server affected by Regular Expression Denial of Service (ReDoS) via `$regex` query in LiveQuery
Back to all
CVE

CVE-2026-30925

Parse Server affected by Regular Expression Denial of Service (ReDoS) via `$regex` query in LiveQuery

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.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
4.0
CVSS:4.0/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
C
H
U
0
-
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Related Resources

No items found.

References

https://github.com/parse-community/parse-server/releases/tag/8.6.11, https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30925.json, https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j, https://nvd.nist.gov/vuln/detail/CVE-2026-30925

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00021%
EPSS Percentile
0.06061%
Introduced Version
532a461d30a6ed4457839f2caf5f30d5abf51a55
Fix Available
aa7c57e9176409be9cf60e1bd0153961a6af7ab5

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading