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CVE

CVE-2026-30949

Parse Server missing audience validation in Keycloak authentication adapter
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CVE

CVE-2026-30949

Parse Server missing audience validation in Keycloak authentication adapter

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

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/security/advisories/GHSA-48mh-j4p5-7j9v, https://nvd.nist.gov/vuln/detail/CVE-2026-30949, https://github.com/parse-community/parse-server, 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

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.00046%
EPSS Percentile
0.14275%
Introduced Version
9.0.0,9.0.0-alpha.1,4.4.0
Fix Available
9.5.2-alpha.5,8.6.18

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