CVE-2026-7307 (GCVE-0-2026-7307)

Vulnerability from cvelistv5 – Published: 2026-05-19 10:52 – Updated: 2026-05-20 15:48
VLAI?
Title
Keycloak: keycloak: denial of service via specially crafted saml input
Summary
A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-1286 - Improper Validation of Syntactic Correctness of Input
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:19594 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19595 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19596 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19597 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-7307 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2476526 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2.16-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
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Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-21 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
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Red Hat Red Hat build of Keycloak 26.2 Unaffected: 26.2-21 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.2.16     cpe:/a:redhat:build_keycloak:26.2::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.12-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
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Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
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Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.12     cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Date Public ?
2026-05-19 10:42
Credits
Red Hat would like to thank Anchels for reporting this issue.
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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