Missing XML Validation Affecting keycloak-26.5 package, versions <26.5.3-r0


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.37% (29th percentile)

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  • Snyk IDSNYK-WOLFILATEST-KEYCLOAK265-15394903
  • published4 Mar 2026
  • disclosed26 Jan 2026

Introduced: 26 Jan 2026

CVE-2026-1190  (opens in a new tab)
CWE-112  (opens in a new tab)

How to fix?

Upgrade Wolfi keycloak-26.5 to version 26.5.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream keycloak-26.5 package and not the keycloak-26.5 package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language (SAML) setup, it fails to validate the NotOnOrAfter timestamp within the SubjectConfirmationData. This allows an attacker to delay the expiration of SAML responses, potentially extending the time a response is considered valid and leading to unexpected session durations or resource consumption.

CVSS Base Scores

version 3.1