CVE-2026-97176

Keycloak-services: keycloak-services: essential acr requirement silently bypassed via cookie authenticator

CVSS 3.1 4.2 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-97176

Published

A flaw was found in the Level of Authentication enforcement mechanism of Keycloak, an identity and access management solution. The issue occurs when a client specifically requires a higher security level for a user who already has an active session at a lower level. Due to a logic error in how session re-evaluations are handled, Keycloak may incorrectly issue a token at the lower security level instead of enforcing the required higher level, potentially allowing unauthorized access to sensitive resources that rely on these security claims.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-97176

Published

keycloak-services

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Build of Keycloak",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "keycloak-services",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:"
                    ]
                }

rhbk/keycloak-rhel9

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Build of Keycloak",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rhbk/keycloak-rhel9",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:"
                    ]
                }

keycloak-services

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Single Sign-On 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "keycloak-services",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/a:redhat:red_hat_single_sign_on:7"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON