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CVE-2026-7307

Keycloak: keycloak: denial of service via specially crafted saml input

Published: May 19, 2026Updated: Jul 15, 2026 Sources: CVE List NVD BDUCWE-1286
7.5HIGH
NVD MITRE
EPSS Score
0.7%
Top 48.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-1286

Affected Products

Red Hat Inc.
commercial·USaka Red Hat, redhat
Red Hat build of Keycloak 26.2On-prem
Operating Systems / linux-distro
Red Hat build of Keycloak 26.2.16On-prem
OSS Libraries / generic-library
Red Hat build of Keycloak 26.4On-premWeb App
Web & CMS Plugins
Red Hat build of Keycloak 26.4.12On-prem
Operating Systems / linux-distro
build of keycloakOn-prem
Operating Systems / linux-distro
KeycloakOn-prem
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro

Exploitability

Official Patch Available
Workaround Available
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References

https://access.redhat.com/errata/RHSA-2026:19594
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:19595
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:19596
access.redhat.com
and 10 more references View all →

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