Detections
Analytics

SCA: security update for org.keycloak:keycloak-services (GHSA-5v8v-xvjv-57x7)

medium Tenable Cloud Security Plugin ID 444751

Description

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

 - A flaw was found in Keycloak. A remote attacker can exploit a Cross-Origin Resource Sharing (CORS) header
 injection vulnerability in Keycloak's User-Managed Access (UMA) token endpoint. This flaw occurs because
 the `azp` claim from a client-supplied JSON Web Token (JWT) is used to set the `Access-Control-Allow-
 Origin` header before the JWT signature is validated. When a specially crafted JWT with an attacker-
 controlled `azp` value is processed, this value is reflected as the CORS origin, even if the grant is
 later rejected. This can lead to the exposure of low-sensitivity information from authorization server
 error responses, weakening origin isolation, but only when a target client is misconfigured with
 `webOrigins: ["*"]`. (CVE-2026-37977)

Solution

Update the org.keycloak:keycloak-services library and its related packages to version 26.4.13 or later.

See Also

https://github.com/advisories/GHSA-5v8v-xvjv-57x7

Plugin Details

Severity: Medium

ID: 444751

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 7/15/2026

Updated: 7/15/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-37977

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:L/I:N/A:N

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/6/2026

Vulnerability Publication Date: 4/6/2026

Reference Information

CVE: CVE-2026-37977

cwe: CWE-346