CVE-2026-18572 — MEDIUM (6.5)

Vulnerability 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 Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Redhat	Build Of Keycloak	-

Related Weaknesses (CWE)

CWE-863

References

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

FAQ

What is CVE-2026-18572?

CVE-2026-18572 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 discover...

How severe is CVE-2026-18572?

CVE-2026-18572 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18572?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Build Of Keycloak.