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Vulnerability record · CVE-2026-18572 · published 2 August 2026

CVE-2026-18572: Redhat build of keycloak incorrect authorization vulnerability

Redhat · Build Of Keycloak

Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours). A flaw was discovered where a user can include a fake time value in their authorization request that overrides the actual server time. This allows the user to bypass these time-based restrictions and access protected resources at unauthorized times.

6.5 CVSS 3.1 Medium EPSS 0.39% · top 69.4% CWE-863 · Incorrect authorization
6.5CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Sep 2026Last modified by NVD

Description

Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours). A flaw was discovered where a user can include a fake time value in their authorization request that overrides the actual server time. This allows the user to bypass these time-based restrictions and access protected resources at unauthorized times.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:68277
https://access.redhat.com/errata/RHSA-2026:68278
https://access.redhat.com/security/cve/CVE-2026-18572 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2509763 Issue TrackingVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-18572), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.