UBUNTU-CVE-2026-19607

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Source

https://ubuntu.com/security/CVE-2026-19607

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19607.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-19607

Upstream

CVE-2026-19607

Published

2026-09-16T16:17:00Z

Modified

2026-09-24T02:00:26Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A flaw was found in the first-broker-login flow of the keycloak-services component. This component handles the initial authentication and account linking when a user logs in via an external identity provider. The issue allows an attacker to register a matching username on an external provider to trigger a collision in Keycloak, which results in the legitimate user being locked out of their account.

References

Affected packages

Ubuntu:24.04:LTS / python-keycloak

Package

Name: python-keycloak
Purl: pkg:deb/ubuntu/python-keycloak?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.3.0+dfsg-2

3.9.0+dfsg-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-keycloak",
            "binary_version": "3.9.0+dfsg-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19607.json"