CVE-2026-2575 is a medium-severity security vulnerability in org.keycloak:keycloak-saml-adapter-core (maven), affecting versions < 26.5.4. It is fixed in 26.5.4.
A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.
CVE-2026-2575 has a CVSS score of 5.3 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (26.5.4). Upgrading removes the vulnerable code path.
maven
org.keycloak:keycloak-saml-adapter-core (< 26.5.4)org.keycloak:keycloak-saml-core (< 26.5.4)org.keycloak:keycloak-services (< 26.5.4)org.keycloak:keycloak-saml-adapter-core → 26.5.4 (maven)org.keycloak:keycloak-saml-core → 26.5.4 (maven)org.keycloak:keycloak-services → 26.5.4 (maven)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-2575 is reachable in your applications. Explore open-source security for your team.
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Already deployed Kodem? See CVE-2026-2575 in your environment →Upgrade the following packages to resolve this vulnerability:
org.keycloak:keycloak-saml-adapter-core to 26.5.4 or laterorg.keycloak:keycloak-saml-core to 26.5.4 or laterorg.keycloak:keycloak-services to 26.5.4 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-2575 is a medium-severity security vulnerability in org.keycloak:keycloak-saml-adapter-core (maven), affecting versions < 26.5.4. It is fixed in 26.5.4.
CVE-2026-2575 has a CVSS score of 5.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
org.keycloak:keycloak-saml-adapter-core (maven) (versions < 26.5.4)org.keycloak:keycloak-saml-core (maven) (versions < 26.5.4)org.keycloak:keycloak-services (maven) (versions < 26.5.4)Yes. CVE-2026-2575 is fixed in 26.5.4. Upgrade to this version or later.
Whether CVE-2026-2575 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
org.keycloak:keycloak-saml-adapter-core to 26.5.4 or laterorg.keycloak:keycloak-saml-core to 26.5.4 or laterorg.keycloak:keycloak-services to 26.5.4 or later