What is GHSA-48mh-j4p5-7j9v?

GHSA-48mh-j4p5-7j9v is a security advisory published by GitHub Security Advisories with High severity. Parse Server missing audience validation in Keycloak authentication adapter

Which CVE IDs does GHSA-48mh-j4p5-7j9v cover?

GHSA-48mh-j4p5-7j9v covers the following CVE IDs: CVE-2026-30949. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-48mh-j4p5-7j9v?

GHSA-48mh-j4p5-7j9v affects 2 products, including: npm/parse-server:\u003e= 9.0.0, \u003c 9.5.2-alpha.5; npm/parse-server:\u003c 8.6.18.

GHSA-48mh-j4p5-7j9vHigh

Parse Server missing audience validation in Keycloak authentication adapter

Vendor

GitHub Security Advisories

Published

March 11, 2026

Last Modified

March 11, 2026

🔗 CVE IDs covered (1)

CVE-2026-30949 →

📋 Description

Impact

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.

Patches

The fix replaces the userinfo HTTP call with local JWT verification and enforces azp claim validation against the configured client-id.

Workarounds

None.

References

GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v
Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5
Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.18

🎯 Affected products2

npm/parse-server:>= 9.0.0, < 9.5.2-alpha.5
npm/parse-server:< 8.6.18