CVE-2026-7307
Keycloak: Denial of Service via specially crafted SAML input
7.5
HIGH
CVSS 3.1
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.
How to fix CVE-2026-7307
To remediate CVE-2026-7307, upgrade the affected package to a fixed version below.
- Maven/org.keycloak:keycloak-saml-core—upgrade to 26.6.2 or later
Is CVE-2026-7307 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-7307.
Affected packages (1)
- from 0, < 26.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |