CVE-2026-30949

HIGH EPSS 34.1%
Published Mar 10, 20263mo ago · Modified Mar 11, 20263mo ago
7.6 CVSS 4.0
High
Find Similar
Published Mar 10, 2026 3mo ago
Last Modified Mar 11, 2026 3mo ago

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.5 and 8.6.18, the Keycloak authentication adapter does not validate the azp (authorized party) claim of Keycloak access tokens against the configured client-id. A valid access token issued by the same Keycloak realm for a different client application can be used to authenticate as any user on the Parse Server that uses the Keycloak adapter. This enables cross-application account takeover in multi-client Keycloak realms. All Parse Server deployments that use the Keycloak authentication adapter with a Keycloak realm that has multiple client applications are affected. This vulnerability is fixed in 9.5.2-alpha.5 and 8.6.18.

CVSS Details

Base Score
7.6
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
34.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-287 Improper Authentication Authentication

Affected Products 6

VendorProductVersionRange
parseplatformparse-server* <8.6.18
parseplatformparse-server*≥9.0.0  –  <9.5.2
parseplatformparse-server9.5.2any
parseplatformparse-server9.5.2any
parseplatformparse-server9.5.2any
parseplatformparse-server9.5.2any

References 3

  • github.com https://github.com/parse-community/parse-server/releases/tag/8.6.18
    ProductRelease Notes
  • github.com https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5
    ProductRelease Notes
  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v
    PatchVendor Advisory

Remediation

  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v
    PatchVendor Advisory