CVE-2026-107123 (GCVE-0-2026-107123)

Vulnerability from cvelistv5 – Published: 2026-11-05 16:04 – Updated: 2026-11-06 10:24
VLAI
Title
Keycloak-services: keycloak-services: unauthenticated cpu denial of service via saml xml datetime and duration parsing
Summary
A flaw was found in the SAML XML processing component of Keycloak, an open-source identity and access management solution. The issue occurs when the server parses XML documents containing excessively long dateTime or duration values. Because these strings are not properly validated before processing, the XML parser consumes excessive CPU time. An unauthenticated remote attacker can exploit this by sending specially crafted SAML requests to the server, leading to high CPU utilization and a denial of service for all users.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 20:53 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1129 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:95761 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-107123 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2547297 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat build of Keycloak 26.6.8     cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
Create a notification for this product.
Date Public
2026-11-05 00:00
Credits
Red Hat would like to thank Mohammed LACHHAB for reporting this issue.
Show details on NVD website
To clipboard 

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