CVE-2026-30835

Name: CVE-2026-30835
Creator: NVD / NIST
Published: 2026-03-06T21:16:17.56+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2026-30835 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.7 and 9.5.0-alpha.6, malformed $regex query parameter (e.g. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.7 and 9.5.0-alpha.6, malformed $regex query parameter (e.g. [abc) causes the database to return a structured error object that is passed unsanitized through the API response. This leaks database internals such as error messages, error codes, code names, cluster timestamps, and topology details. The vulnerability is exploitable by any client that can send query requests, depending on the deployment's permission configuration. This issue has been patched in versions 8.6.7 and 9.5.0-alpha.6.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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

EPSS Probability

0.34%

25.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-209

Affected Software

Vendor	Product	Versions	Update
Parseplatform	Parse-Server	< 8.6.7	—
Parseplatform	Parse-Server	>= 9.0.0, < 9.5.0	—
Parseplatform	Parse-Server	9.5.0	Alpha1

References

https://github.com/parse-community/parse-server/releases/tag/8.6.7Product, Release Notes
https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.6Product, Release Notes
https://github.com/parse-community/parse-server/security/advisories/GHSA-9cp7-3q5w-j92gPatch, Vendor Advisory

Timeline

Published: Mar 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-30835?

How severe is CVE-2026-30835?

CVE-2026-30835 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2026-30835?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-30835?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST