Detections
Analytics
Keycloak < 26.6.2 Multiple Vulnerabilities
high Nessus Plugin ID 316461
Synopsis
The remote host is affected by multiple vulnerabilities.Description
Keycloak versions installed prior to 26.6.2 are affected by multiple vulnerabilities, including:- A flaw was found in Keycloak's redirect URI validation logic. An attacker can bypass validation to redirect users to malicious sites, potentially leading to phishing attacks and credential theft. (CVE-2026-7504)
- A session fixation vulnerability exists in the OIDC login flow. An unauthenticated attacker can pre-create sessions leading to account takeover if a user logs in using the attacker's session. (CVE-2026-7507)
- A flaw was found in Keycloak's SAML endpoint processing. A crafted XML request to the SAML endpoint can cause a denial of service by consuming excessive server resources. (CVE-2026-7307)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade Keycloak to 26.6.2 or later.See Also
Plugin Details
Severity: High
ID: 316461
File Name: keycloak_26_6_2.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Misc.
Published: 5/22/2026
Updated: 5/22/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 8.4
CVSS v2
Risk Factor: High
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
CVSS Score Source: CVE-2026-7504
CVSS v3
Risk Factor: High
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Vulnerability Information
CPE: cpe:/a:keycloak:keycloak
Required KB Items: Host/local_checks_enabled, Host/uname, installed_sw/Keycloak
Patch Publication Date: 5/19/2026
Vulnerability Publication Date: 5/19/2026
Reference Information
CVE: CVE-2026-37978, CVE-2026-37979, CVE-2026-37980, CVE-2026-37981, CVE-2026-37982, CVE-2026-4630, CVE-2026-7307, CVE-2026-7504, CVE-2026-7507, CVE-2026-7571
IAVB: 2026-B-0131