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Vulnerability · Published Mar 18, 2026 · Assigned by redhat

CVE-2026-2092Keycloak-services: keycloak: unauthorized access via improper validation of encrypted saml assertions

High 7.7

In plain English

A high-severity security flaw in Red Hat build of Keycloak 26.2 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.7High
Exploit odds (30 days)0.4%top 67.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.keycloak:keycloak-servicesno fix listedGHSA-794g-x443-36f7
Mavenorg.keycloak:keycloak-servicesno fix listedGHSA-794g-x443-36f7
Mavenorg.keycloak:keycloak-services26.5.5GHSA-794g-x443-36f7

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat build of Keycloak 26.2 see references
Red Hat Red Hat build of Keycloak 26.2 see references
Red Hat Red Hat build of Keycloak 26.2 see references
Red Hat Red Hat build of Keycloak 26.2.14 see references
Red Hat Red Hat build of Keycloak 26.4 see references
Red Hat Red Hat build of Keycloak 26.4 see references
Red Hat Red Hat build of Keycloak 26.4 see references
Red Hat Red Hat build of Keycloak 26.4.10 see references
Red Hat Red Hat Single Sign-On 7.6.13 see references
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 see references
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 see references
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 see references
Red Hat RHEL-8 based Middleware Containers see references

Weakness: CWE-1287 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

References