Medium severity4.3NVD Advisory· Published May 19, 2026· Updated Jun 10, 2026
CVE-2026-8830
CVE-2026-8830
Description
A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key algorithms, match the realm's configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-servicesMaven | < 26.6.3 | 26.6.3 |
Affected products
3- cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*
Patches
Vulnerability mechanics
References
10- access.redhat.com/security/cve/CVE-2026-8830nvdVendor AdvisoryWEB
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor AdvisoryWEB
- github.com/advisories/GHSA-g8vr-x4qh-25qgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-8830ghsaADVISORY
- access.redhat.com/errata/RHSA-2026:25097nvdWEB
- access.redhat.com/errata/RHSA-2026:25098nvdWEB
- github.com/keycloak/keycloak/commit/47b9aef70948564151af85fd52e0d7e508c76490ghsaWEB
- github.com/keycloak/keycloak/commit/d3da77ef363d698e7a74470ba52fcdce09e394c4ghsaWEB
- github.com/keycloak/keycloak/issues/49133ghsaWEB
- github.com/keycloak/keycloak/pull/49344ghsaWEB
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