Red Hat Single Sign-On 7.6 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

This release of Red Hat Single Sign-On 7.6.13 on RHEL 7 serves as a replacement for Red Hat Single Sign-On 7.6.12, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.

Security Fix(es):
* undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Information disclosure and data deletion via second-order SQL injection (CVE-2026-0603)
* GOSTCTR implementation unable to process more than 255 blocks correctly (CVE-2025-14813)
* PKIX draft CompositeVerifier accepts empty signature sequence as valid (CVE-2026-5588)
* unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion (CVE-2026-3505)
* High integrity impact due to improper DNS domain name constraint enforcement (CVE-2026-42579)
* HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers (CVE-2026-42581)
* HTTP Header Injection via HttpProxyHandler Disabled Validation (CVE-2026-42578)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)
* Denial of Service via malformed HAProxy message (CVE-2026-44893)
* Denial of Service due to resource leak (CVE-2026-48043)
* Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers (CVE-2026-48059)
* Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
* Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
* Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
* Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
* Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512)
* Denial of Service via deeply nested JSON processing (CVE-2026-50193)
* Denial of Service via incomplete fix in async JSON parser (CVE-2026-68494)
* Missing authentication on EAP's IIOP NameService leads to MITM or DoS (CVE-2026-15563)
* Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507)
* Denial of Service via specially crafted SAML input (CVE-2026-7307)
* Denial of Service due to excessive SAMLRequest decompression (CVE-2026-2575)
* Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
* Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 7

Red Hat Single Sign-On 7.6 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

This release of Red Hat Single Sign-On 7.6.13 on RHEL 9 serves as a replacement for Red Hat Single Sign-On 7.6.12, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.

Security Fix(es):
* undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Information disclosure and data deletion via second-order SQL injection (CVE-2026-0603)
* GOSTCTR implementation unable to process more than 255 blocks correctly (CVE-2025-14813)
* PKIX draft CompositeVerifier accepts empty signature sequence as valid (CVE-2026-5588)
* unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion (CVE-2026-3505)
* High integrity impact due to improper DNS domain name constraint enforcement (CVE-2026-42579)
* HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers (CVE-2026-42581)
* HTTP Header Injection via HttpProxyHandler Disabled Validation (CVE-2026-42578)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)
* Denial of Service via malformed HAProxy message (CVE-2026-44893)
* Denial of Service due to resource leak (CVE-2026-48043)
* Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers (CVE-2026-48059)
* Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
* Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
* Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
* Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
* Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512)
* Denial of Service via deeply nested JSON processing (CVE-2026-50193)
* Denial of Service via incomplete fix in async JSON parser (CVE-2026-68494)
* Missing authentication on EAP's IIOP NameService leads to MITM or DoS (CVE-2026-15563)
* Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507)
* Denial of Service via specially crafted SAML input (CVE-2026-7307)
* Denial of Service due to excessive SAMLRequest decompression (CVE-2026-2575)
* Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
* Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 9

Red Hat Single Sign-On 7.6 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

This release of Red Hat Single Sign-On 7.6.13 on RHEL 8 serves as a replacement for Red Hat Single Sign-On 7.6.12, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.

Security Fix(es):
* undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Information disclosure and data deletion via second-order SQL injection (CVE-2026-0603)
* GOSTCTR implementation unable to process more than 255 blocks correctly (CVE-2025-14813)
* PKIX draft CompositeVerifier accepts empty signature sequence as valid (CVE-2026-5588)
* unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion (CVE-2026-3505)
* High integrity impact due to improper DNS domain name constraint enforcement (CVE-2026-42579)
* HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers (CVE-2026-42581)
* HTTP Header Injection via HttpProxyHandler Disabled Validation (CVE-2026-42578)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)
* Denial of Service via malformed HAProxy message (CVE-2026-44893)
* Denial of Service due to resource leak (CVE-2026-48043)
* Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers (CVE-2026-48059)
* Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
* Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
* Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
* Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
* Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512)
* Denial of Service via deeply nested JSON processing (CVE-2026-50193)
* Denial of Service via incomplete fix in async JSON parser (CVE-2026-68494)
* Missing authentication on EAP's IIOP NameService leads to MITM or DoS (CVE-2026-15563)
* Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507)
* Denial of Service via specially crafted SAML input (CVE-2026-7307)
* Denial of Service due to excessive SAMLRequest decompression (CVE-2026-2575)
* Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
* Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 8

Red Hat Single Sign-On is an integrated sign-on solution, available as a
Red Hat JBoss Middleware for OpenShift containerized image. The Red Hat
Single Sign-On for OpenShift image provides an authentication server that
you can use to log in centrally, log out, and register. You can also manage
user accounts for web applications, mobile applications, and RESTful web
services.

This erratum releases a new image for Red Hat Single Sign-On 7.6.13 for
use within the OpenShift Container Platform 3.10, OpenShift Container Platform
3.11, and within the OpenShift Container Platform 4.3 cloud computing
Platform-as-a-Service (PaaS) for on-premise or private cloud deployments,
aligning with the standalone product release. This security update has moderate
impact.

Security fixes:
* undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Information disclosure and data deletion via second-order SQL injection (CVE-2026-0603)
* GOSTCTR implementation unable to process more than 255 blocks correctly (CVE-2025-14813)
* PKIX draft CompositeVerifier accepts empty signature sequence as valid (CVE-2026-5588)
* unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion (CVE-2026-3505)
* High integrity impact due to improper DNS domain name constraint enforcement (CVE-2026-42579)
* HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers (CVE-2026-42581)
* HTTP Header Injection via HttpProxyHandler Disabled Validation (CVE-2026-42578)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)
* Denial of Service via malformed HAProxy message (CVE-2026-44893)
* Denial of Service due to resource leak (CVE-2026-48043)
* Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers (CVE-2026-48059)
* Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
* Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
* Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
* Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
* Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512)
* Denial of Service via deeply nested JSON processing (CVE-2026-50193)
* Denial of Service via incomplete fix in async JSON parser (CVE-2026-68494)
* Missing authentication on EAP's IIOP NameService leads to MITM or DoS (CVE-2026-15563)
* Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507)
* Denial of Service via specially crafted SAML input (CVE-2026-7307)
* Denial of Service due to excessive SAMLRequest decompression (CVE-2026-2575)
* Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
* Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 for OpenShift image security update

<< AUTOMATICALLY GENERATED, EDIT PLEASE >>
Red Hat Single Sign-On 7.6 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

This release of Red Hat Single Sign-On 7.6.13 serves as a replacement for Red Hat Single Sign-On 7.6.12, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.

Security Fix(es):
* undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF (CVE-2025-12543)
* Information disclosure and data deletion via second-order SQL injection (CVE-2026-0603)
* GOSTCTR implementation unable to process more than 255 blocks correctly (CVE-2025-14813)
* PKIX draft CompositeVerifier accepts empty signature sequence as valid (CVE-2026-5588)
* unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion (CVE-2026-3505)
* High integrity impact due to improper DNS domain name constraint enforcement (CVE-2026-42579)
* HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers (CVE-2026-42581)
* HTTP Header Injection via HttpProxyHandler Disabled Validation (CVE-2026-42578)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* Denial of Service via unbounded memory allocation in HTTP content decompression (CVE-2026-42587)
* IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)
* Denial of Service via malformed HAProxy message (CVE-2026-44893)
* Denial of Service due to resource leak (CVE-2026-48043)
* Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers (CVE-2026-48059)
* Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
* Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
* Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
* Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
* Arbitrary code execution via PolymorphicTypeValidator bypass (CVE-2026-54512)
* Denial of Service via deeply nested JSON processing (CVE-2026-50193)
* Denial of Service via incomplete fix in async JSON parser (CVE-2026-68494)
* Missing authentication on EAP's IIOP NameService leads to MITM or DoS (CVE-2026-15563)
* Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507)
* Denial of Service via specially crafted SAML input (CVE-2026-7307)
* Denial of Service due to excessive SAMLRequest decompression (CVE-2026-2575)
* Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)
* Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update

Red Hat build of Apache Camel 4.14.2 for Spring Boot patch release and security update is now available.

The purpose of this text-only errata is to inform you about the security issues fixed.

Security Fix(es):
   
* undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)

* tika-core: Apache Tika core, Apache Tika parsers, Apache Tika PDF parser module: Update to CVE-2025-54988 to expand scope of artifacts affected (CVE-2025-66516)

Uncontrolled Recursion vulnerability in Apache Commons Lang (CVE-2025-48924)

Red Hat Security Advisory: Red Hat Build of Apache Camel 4.14.2 for Spring Boot release.

undertow

A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS).

Search: CVE-2025-9784