CVE-2026-7571

Name: CVE-2026-7571
Creator: NVD / NIST
Published: 2026-05-19T12:16:19.82+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2026-7571 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. A flaw was found in Keycloak. A low-privilege user, with knowledge of user credentials and client ID, can bypass a security control intended to disable the implicit flow in OpenID Connect (OIDC) clients. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

A flaw was found in Keycloak. A low-privilege user, with knowledge of user credentials and client ID, can bypass a security control intended to disable the implicit flow in OpenID Connect (OIDC) clients. By manipulating client data during a session restart, an attacker can obtain an access token that should not be available. This vulnerability can also lead to the exposure of these access tokens in server logs, proxy logs, and HTTP Referrer headers, resulting in sensitive information disclosure.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS Probability

0.34%

26.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-472

Affected Software

Vendor	Product	Versions
Redhat	Build Of Keycloak	>= 26.4, < 26.4.12

References

https://access.redhat.com/errata/RHSA-2026:19596Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:19597Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-7571Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2464263Vendor Advisory

Timeline

Published: May 19, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-7571?

How severe is CVE-2026-7571?

CVE-2026-7571 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2026-7571?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-7571?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST