# CVE-2026-7307

## Summary

- **CVE ID:** CVE-2026-7307
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-1286
- **Published:** May 19, 2026
- **Last Modified:** Aug 27, 2026

## 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.

## Affected Products

- Red Hat — Red Hat build of Keycloak 26.4 (26.4.12-1)
- Red Hat — Red Hat build of Keycloak 26.4 (26.4-17)
- Red Hat — Red Hat build of Keycloak 26.2 (26.2.16-1)
- Red Hat — Red Hat build of Keycloak 26.2 (26.2-21)
- Unknown product (0)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-7307)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2476526)
- [CNA](https://access.redhat.com/errata/RHSA-2026:19594)
- [CNA](https://access.redhat.com/errata/RHSA-2026:19597)
- [CNA](https://access.redhat.com/errata/RHSA-2026:19595)
- [CNA](https://access.redhat.com/errata/RHSA-2026:19596)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7307.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.74%
- **EPSS Percentile:** 52.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._