Answer in brief
CVE-2026-2575 records a Medium severity (CVSS 5.3) vulnerability in Keycloak: Denial of Service due to excessive SAMLRequest decompression. The current sources do not mark it as known exploited. The current feed maps org.keycloak:keycloak-saml-adapter-core (maven), org.keycloak:keycloak-saml-core (maven), org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.keycloak:keycloak-saml-adapter-core (maven), org.keycloak:keycloak-saml-core (maven), org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.keycloak:keycloak-saml-adapter-coremaven | >=0 <26.5.4 | 26.5.4 |
| org.keycloak:keycloak-saml-coremaven | >=0 <26.5.4 | 26.5.4 |
| org.keycloak:keycloak-servicesmaven | >=0 <26.5.4 | 26.5.4 |
Published upstream
Mar 18, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.