Vendor scorecard
Red Hat Keycloak
Red Hat Keycloak security disclosure record — CVE volume, CVSS severity mix and product-category breakdown, sourced from the NIST NVD.
CPE: redhat, keycloak
Product families
1
Open in latest
127
Inferred — see methodology
Last disclosure
Mar 27, 2026
01
Product categories
1 trackedCVE volume, severity mix and the inferred latest shipping version per category.
| Category | CVEs | Volume | Severity mix | Open | Inferred latest |
|---|---|---|---|---|---|
| Keycloak / RH-SSOIdentity & Access Managementkeycloak, single_sign-on, red_hat_single_sign-on | 103 | 127 | 7.6.10HIGH |
02
Recent CVEs
12 shownMost recently published, newest first. Each ID links to its NVD record.
| CVE | Severity | CVSS | Summary | Published |
|---|---|---|---|---|
| CVE-2026-28369(opens NVD record) | High | 8.7 | A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure. | Mar 27, 2026 |
| CVE-2026-28368(opens NVD record) | High | 8.7 | A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources. | Mar 27, 2026 |
| CVE-2026-28367(opens NVD record) | High | 8.7 | A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests. | Mar 27, 2026 |
| CVE-2026-3121(opens NVD record) | Medium | 6.5 | A flaw was found in Keycloak. An administrator with `manage-clients` permission can exploit a misconfiguration where this permission is equivalent to `manage-permissions`. This allows the administrator to escalate privileges and gain control over roles, users, or other administrative functions within the realm. This privilege escalation can occur when admin permissions are enabled at the realm level. | Mar 26, 2026 |
| CVE-2026-4874(opens NVD record) | Low | 3.1 | A flaw was found in Keycloak. An authenticated attacker can perform Server-Side Request Forgery (SSRF) by manipulating the `client_session_host` parameter during refresh token requests. This occurs when a Keycloak client is configured to use the `backchannel.logout.url` with the `application.session.host` placeholder. Successful exploitation allows the attacker to make HTTP requests from the Keycloak server’s network context, potentially probing internal networks or internal APIs, leading to information disclosure. | Mar 26, 2026 |
| CVE-2026-3260(opens NVD record) | Medium | 5.9 | A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending an HTTP GET request containing multipart/form-data content. If the underlying application processes parameters using methods like `getParameterMap()`, the server prematurely parses and stores this content to disk. This could lead to resource exhaustion, potentially resulting in a Denial of Service (DoS). | Mar 24, 2026 |
| CVE-2026-4366(opens NVD record) | Medium | 5.8 | A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended requests to internal or restricted resources. As a result, sensitive internal services such as cloud metadata endpoints could be accessed. This issue may lead to information disclosure and enable attackers to map internal network infrastructure. | Mar 18, 2026 |
| CVE-2026-3047(opens NVD record) | High | 8.8 | A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions. | Mar 5, 2026 |
| CVE-2026-3009(opens NVD record) | High | 8.1 | A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider. | Mar 5, 2026 |
| CVE-2025-12150(opens NVD record) | Low | 3.1 | A flaw was found in Keycloak’s WebAuthn registration component. This vulnerability allows an attacker to bypass the configured attestation policy and register untrusted or forged authenticators via submission of an attestation object with fmt: "none", even when the realm is configured to require direct attestation. This can lead to weakened authentication integrity and unauthorized authenticator registration. | Feb 27, 2026 |
| CVE-2026-0871(opens NVD record) | Medium | 4.9 | A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the "Only administrators can view" setting for unmanaged attributes, allowing them to modify these attributes. This improper access control can lead to unauthorized changes to user profiles, even when the system is configured to restrict such modifications. | Feb 27, 2026 |
| CVE-2025-12543(opens NVD record) | Critical | 9.6 | A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perform internal network scans, or hijack user sessions. | Jan 7, 2026 |
79 CVEs · 1 product families