CVE-2026-7307
HIGHKeycloak: keycloak: denial of service via specially crafted saml input
Title source: cnaDescription
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.
References (6)
Core 6
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19594
https://access.redhat.com/errata/RHSA-2026:19594
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19595
https://access.redhat.com/errata/RHSA-2026:19595
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19596
https://access.redhat.com/errata/RHSA-2026:19596
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19597
https://access.redhat.com/errata/RHSA-2026:19597
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-7307
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2476526
https://bugzilla.redhat.com/show_bug.cgi?id=2476526
Scores
CVSS v3
7.5
EPSS
0.0004
EPSS Percentile
14.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1286
Status
published
Products (7)
Red Hat/Red Hat Build of Keycloak
Red Hat/Red Hat build of Keycloak 26.2
26.2-21
Red Hat/Red Hat build of Keycloak 26.2
26.2.16-1
Red Hat/Red Hat build of Keycloak 26.2.16
Red Hat/Red Hat build of Keycloak 26.4
26.4-17
Red Hat/Red Hat build of Keycloak 26.4
26.4.12-1
Red Hat/Red Hat build of Keycloak 26.4.12
Published
May 19, 2026
Tracked Since
May 19, 2026