---
id: CVE-2026-18218
title: >-
  A flaw was found in the TokenManager component of the Keycloak identity
  management service
summary: >-
  A flaw was found in the TokenManager component of the Keycloak identity
  management service. When an administrator attempts to revoke tokens for a
  specific application (client) using a "not-before" policy, the revocation may
  be silently i…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-862
vendor: redhat
product: build_of_keycloak
affected:
  - build_of_keycloak
patched:
  - build_of_keycloak 26.6.7
published: '2026-07-31'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:17:09.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18218'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:68277'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:68278'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-18218'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2508313'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-18218.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-18218'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18218'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00168
epssPercentile: 0.06464
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-31T15:56:18.182533Z'
ingestedAt: '2026-08-08T15:23:02.372Z'
---

## Overview

A flaw was found in the TokenManager component of the Keycloak identity management service. When an administrator attempts to revoke tokens for a specific application (client) using a "not-before" policy, the revocation may be silently ignored if the overall security realm already has an older, non-zero revocation policy in place. This issue can allow previously issued tokens to remain valid for refreshing sessions and accessing user information even after an administrator has attempted to invalidate them.
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## Affected

- `build_of_keycloak`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:68278** · Red Hat · fixed in: Red Hat build of Keycloak 26.6.7 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68278)
- **RHSA-2026:68277** · Red Hat · fixed in: Red Hat build of Keycloak 26.6 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68277)