Single Sign On
by Red Hat
CVEs (121)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2026-28368 | Hig | 0.50 | 8.7 | 0.01 | Mar 27, 2026 | 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… | ||
| CVE-2026-28367 | Hig | 0.50 | 8.7 | 0.01 | Mar 27, 2026 | 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… | ||
| CVE-2020-1714 | Hig | 0.50 | 8.8 | 0.03 | May 13, 2020 | A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks. This flaw allows an attacker to inject arbitrarily serialized Java Objects, which would then get deserialized in a privileged context and potentially… | ||
| CVE-2019-10174 | Hig | 0.50 | 8.8 | 0.03 | Nov 25, 2019 | A vulnerability was found in Infinispan such that the invokeAccessibly method from the public class ReflectionUtil allows any application class to invoke private methods in any class with Infinispan's privileges. The attacker can use reflection to introduce new, malicious… | ||
| CVE-2023-6841 | Hig | 0.49 | 7.5 | 0.01 | Sep 10, 2024 | A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited,an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values. | ||
| CVE-2023-5379 | Hig | 0.49 | 7.5 | 0.01 | Dec 12, 2023 | A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens… | ||
| CVE-2023-3223 | Hig | 0.49 | 7.5 | 0.03 | Sep 27, 2023 | A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size,… | ||
| CVE-2022-1278 | Hig | 0.49 | 7.5 | 0.01 | Sep 13, 2022 | A flaw was found in WildFly, where an attacker can see deployment names, endpoints, and any other data the trace payload may contain. | ||
| CVE-2022-1259 | Hig | 0.49 | 7.5 | 0.01 | Aug 31, 2022 | A flaw was found in Undertow. A potential security issue in flow control handling by the browser over HTTP/2 may cause overhead or a denial of service in the server. This flaw exists because of an incomplete fix for CVE-2021-3629. | ||
| CVE-2022-0853 | Hig | 0.49 | 7.5 | 0.01 | Mar 11, 2022 | A flaw was found in JBoss-client. The vulnerability occurs due to a memory leak on the JBoss client-side, when using UserTransaction repeatedly and leads to information leakage vulnerability. | ||
| CVE-2021-3637 | Hig | 0.49 | 7.5 | 0.01 | Jul 9, 2021 | A flaw was found in keycloak-model-infinispan in keycloak versions before 14.0.0 where authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly which could lead to a DoS attack. | ||
| CVE-2019-14888 | Hig | 0.49 | 7.5 | 0.02 | Jan 23, 2020 | A vulnerability was found in the Undertow HTTP server in versions before 2.0.28.SP1 when listening on HTTPS. An attacker can target the HTTPS port to carry out a Denial Of Service (DOS) to make the service unavailable on SSL. | ||
| CVE-2017-12159 | Hig | 0.49 | 7.5 | 0.03 | Oct 26, 2017 | It was found that the cookie used for CSRF prevention in Keycloak was not unique to each session. An attacker could use this flaw to gain access to an authenticated user session, leading to possible information disclosure or further attacks. | ||
| CVE-2019-9514 | Hig | 0.48 | 7.5 | 0.83 | Aug 13, 2019 | Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service. The attacker opens a number of streams and sends an invalid request over each stream that should solicit a stream of RST_STREAM frames from the peer. Depending on how the… | ||
| CVE-2026-3009 | Hig | 0.46 | 8.1 | 0.00 | Mar 5, 2026 | 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… | ||
| CVE-2022-4137 | Hig | 0.46 | 8.1 | 0.01 | Sep 25, 2023 | A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a… | ||
| CVE-2021-3461 | Hig | 0.46 | 7.1 | 0.00 | Apr 1, 2022 | A flaw was found in keycloak where keycloak may fail to logout user session if the logout request comes from external SAML identity provider and Principal Type is set to Attribute [Name]. | ||
| CVE-2022-3916 | Med | 0.44 | 6.8 | 0.01 | Sep 20, 2023 | A flaw was found in the offline_access scope in Keycloak. This issue would affect users of shared computers more (especially if cookies are not cleared), due to a lack of root session validation, and the reuse of session ids across root and user authentication sessions. This… | ||
| CVE-2021-20262 | Med | 0.44 | 6.8 | 0.00 | Mar 9, 2021 | A flaw was found in Keycloak 12.0.0 where re-authentication does not occur while updating the password. This flaw allows an attacker to take over an account if they can obtain temporary, physical access to a user’s browser. The highest threat from this vulnerability is to… | ||
| CVE-2023-6563 | Hig | 0.43 | 7.7 | 0.01 | Dec 14, 2023 | An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open… |
- risk 0.50cvss 8.7epss 0.01
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…
- risk 0.50cvss 8.7epss 0.01
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…
- risk 0.50cvss 8.8epss 0.03
A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks. This flaw allows an attacker to inject arbitrarily serialized Java Objects, which would then get deserialized in a privileged context and potentially…
- risk 0.50cvss 8.8epss 0.03
A vulnerability was found in Infinispan such that the invokeAccessibly method from the public class ReflectionUtil allows any application class to invoke private methods in any class with Infinispan's privileges. The attacker can use reflection to introduce new, malicious…
- risk 0.49cvss 7.5epss 0.01
A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited,an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values.
- risk 0.49cvss 7.5epss 0.01
A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens…
- risk 0.49cvss 7.5epss 0.03
A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size,…
- risk 0.49cvss 7.5epss 0.01
A flaw was found in WildFly, where an attacker can see deployment names, endpoints, and any other data the trace payload may contain.
- risk 0.49cvss 7.5epss 0.01
A flaw was found in Undertow. A potential security issue in flow control handling by the browser over HTTP/2 may cause overhead or a denial of service in the server. This flaw exists because of an incomplete fix for CVE-2021-3629.
- risk 0.49cvss 7.5epss 0.01
A flaw was found in JBoss-client. The vulnerability occurs due to a memory leak on the JBoss client-side, when using UserTransaction repeatedly and leads to information leakage vulnerability.
- risk 0.49cvss 7.5epss 0.01
A flaw was found in keycloak-model-infinispan in keycloak versions before 14.0.0 where authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly which could lead to a DoS attack.
- risk 0.49cvss 7.5epss 0.02
A vulnerability was found in the Undertow HTTP server in versions before 2.0.28.SP1 when listening on HTTPS. An attacker can target the HTTPS port to carry out a Denial Of Service (DOS) to make the service unavailable on SSL.
- risk 0.49cvss 7.5epss 0.03
It was found that the cookie used for CSRF prevention in Keycloak was not unique to each session. An attacker could use this flaw to gain access to an authenticated user session, leading to possible information disclosure or further attacks.
- risk 0.48cvss 7.5epss 0.83
Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service. The attacker opens a number of streams and sends an invalid request over each stream that should solicit a stream of RST_STREAM frames from the peer. Depending on how the…
- risk 0.46cvss 8.1epss 0.00
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…
- risk 0.46cvss 8.1epss 0.01
A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a…
- risk 0.46cvss 7.1epss 0.00
A flaw was found in keycloak where keycloak may fail to logout user session if the logout request comes from external SAML identity provider and Principal Type is set to Attribute [Name].
- risk 0.44cvss 6.8epss 0.01
A flaw was found in the offline_access scope in Keycloak. This issue would affect users of shared computers more (especially if cookies are not cleared), due to a lack of root session validation, and the reuse of session ids across root and user authentication sessions. This…
- risk 0.44cvss 6.8epss 0.00
A flaw was found in Keycloak 12.0.0 where re-authentication does not occur while updating the password. This flaw allows an attacker to take over an account if they can obtain temporary, physical access to a user’s browser. The highest threat from this vulnerability is to…
- risk 0.43cvss 7.7epss 0.01
An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open…
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