Detections
Analytics

SCA: security update for org.keycloak:keycloak-services (GHSA-h4wv-g838-66g3)

high Tenable Self-Hosted Container Security Plugin ID 439847

Description

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

 - 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. (CVE-2026-4634)

Solution

Update the org.keycloak:keycloak-services library and its related packages to version 26.5.7 or later.

See Also

https://github.com/advisories/GHSA-h4wv-g838-66g3

Plugin Details

Severity: High

ID: 439847

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 4/4/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-4634

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/2/2026

Vulnerability Publication Date: 4/2/2026

Reference Information

CVE: CVE-2026-4634