BIT-keycloak-2026-4634

See a problem?
Import Source
https://github.com/bitnami/vulndb/tree/main/data/keycloak/BIT-keycloak-2026-4634.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-keycloak-2026-4634
Aliases
Published
2026-08-25T11:42:30Z
Modified
2026-09-08T08:48:06Z
Summary
Keycloak: keycloak: denial of service via excessive processing of openid connect scope parameters
Details

A flaw was found in Keycloak. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request with an excessively long scope parameter to the OpenID Connect (OIDC) token endpoint. This leads to high resource consumption and prolonged processing times, ultimately resulting in a Denial of Service (DoS) for the Keycloak server.

Database specific 
{
    "cpes": [
        "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:text-only:*:*:*",
        "cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
}
References

Affected packages

Bitnami / keycloak

Package

Name
keycloak
Purl
pkg:bitnami/keycloak

Severity

  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
26.2.0
Fixed
26.2.1
Introduced
26.2.15
Fixed
26.3.0
Introduced
26.4.0
Fixed
26.4.1
Introduced
26.4.11
Fixed
26.5.0

Database specific

source 
"https://github.com/bitnami/vulndb/tree/main/data/keycloak/BIT-keycloak-2026-4634.json"