EUVD-2026-10868 · Published Mar 10, 2026
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.
Technologies
Weaknesses
CVSS scores
- v4.07.6
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 - v3.18.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
References
- https://github.com/parse-community/parse-server/releases/tag/8.6.18
- https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.5
- https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v
- https://nvd.nist.gov/vuln/detail/CVE-2026-30949
- https://github.com/parse-community/parse-server
Potentially impacted assets
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