CVE-2026-30229

Name: CVE-2026-30229
Creator: NVD / NIST
Published: 2026-03-06T21:16:16.92+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.5/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2026-30229 is a high-severity vulnerability rated 8.5/10 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 8.6.6 and 9.5.0-alpha.4, the readOnlyMasterKey can call POST /loginAs to obtain a valid session token for any user. EPSS estimates a 0.39% 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 8.6.6 and 9.5.0-alpha.4, the readOnlyMasterKey can call POST /loginAs to obtain a valid session token for any user. This allows a read-only credential to impersonate arbitrary users with full read and write access to their data. Any Parse Server deployment that uses readOnlyMasterKey is affected. This issue has been patched in versions 8.6.6 and 9.5.0-alpha.4.

Metrics

CVSS 3.1

7.2/10

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

CVSS 4.0

8.5/10

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

0.39%

30.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions	Update
Parseplatform	Parse-Server	< 8.6.6	—
Parseplatform	Parse-Server	>= 9.0.0, <= 9.4.1	—
Parseplatform	Parse-Server	9.5.0	Alpha1

References

https://github.com/parse-community/parse-server/releases/tag/8.6.6Product, Release Notes
https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4Product, Release Notes
https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2026-30229?

How severe is CVE-2026-30229?

CVE-2026-30229 has a CVSS score of 8.5/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2026-30229?

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-2026-30229?

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

Scan your code now

Source: NVD / NIST