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CVE-2026-7307

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

Published: May 19, 2026Updated: Jun 3, 2026 Sources: CVE List NVD BDUCWE-1286
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.7%
Top 50.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

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
Open in CVSS calculator →

Weaknesses

CWE-1286

Affected Products

KeycloakRed Hat Inc.
On-premSecurity Product
Security Products / identity-access-mgmt
Red Hat build of Keycloak 26.2Red Hat
On-prem
Operating Systems / linux-distro
Red Hat build of Keycloak 26.2.16Red Hat
On-prem
Operating Systems / linux-distro
Red Hat build of Keycloak 26.4Red Hat
On-premWeb App
Web & CMS Plugins
Red Hat build of Keycloak 26.4.12Red Hat
On-prem
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
red hatcommercialUSOperating Systemsaka red hat
and 1 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

References

https://github.com/advisories/GHSA-p5mv-gj8j-xqgf
github.com
https://github.com/keycloak/keycloak/issues/49108
github.com
https://bugzilla.redhat.com/show_bug.cgi?id=2476526
bugzilla.redhat.com
and 8 more references View all →

Timeline

Published
May 19, 2026
Last Updated
Jun 3, 2026

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