Detections
Analytics

Echo: keycloak-25: security update to 25.0.6+e1org.keycloak:keycloak-services: security update to 26.6.3

medium Tenable Self-Hosted Container Security Plugin ID 459203

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A flaw was found in Keycloak's ClientRegistrationAuth component. A remote unauthenticated attacker can
 exploit this vulnerability by sending a specially crafted POST request with a malformed 'Authorization:
 Bearer' header to any client registration endpoint. This can lead to an ArrayIndexOutOfBoundsException,
 causing the server to return an HTTP 500 error and resulting in a Denial of Service (DoS) for the affected
 service. (CVE-2026-9803)

Solution

Update the keycloak-25 library and its related packages to version 25.0.6+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-9803

Plugin Details

Severity: Medium

ID: 459203

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-9803

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2026

Vulnerability Publication Date: 5/28/2026

Reference Information

CVE: CVE-2026-9803