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CVE

CVE-2026-30949

Parse Server is missing audience validation in Keycloak authentication adapter
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CVE

CVE-2026-30949

Parse Server is missing audience validation in Keycloak authentication adapter

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.6
-
4.0
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
C
H
U
0
-
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Related Resources

No items found.

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/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30949.json, https://github.com/parse-community/parse-server/security/advisories/GHSA-48mh-j4p5-7j9v, https://nvd.nist.gov/vuln/detail/CVE-2026-30949

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00046%
EPSS Percentile
0.14706%
Introduced Version
0
Fix Available
0d4e3bbb9ba4bfab7b8362cf286bf45beb970de6

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