Red Hat Security Advisory: Red Hat build of Keycloak 26.4.15 Images Security Update
Affects Red HatSource GCVE Database
Public exploit available (Exploit-DB) · CVSS 9.1 Critical.
Data as of 12 Nov 2026, 19:47 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 9.1 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 18 Aug 2026
Detectable: evidence found.
nuclei template: Keycloak < 26.7.2 - Unauthenticated Account Takeover via Reset-Credentials Bypass
Weaponized: evidence found.
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by Red Hat, Inc.
, 13 days before disclosure
CVE published
on cve.org
, t = 0
In Threat Radar
record ingested
, 16 minutes after disclosure
First Exploit-DB entry (opens in a new tab)
Keycloak 26.7.2 - Unauthenticated Account Takeover
, 64 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat build of Keycloak 26.4rhbk/keycloak-operator-bundle | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4rhbk/keycloak-rhel9 | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4rhbk/keycloak-rhel9-operator | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4.15keycloak-services | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4.15rhbk-openshift-rhel9/rhbk-openshift-rhel9 | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6rhbk/keycloak-operator-bundle | Affected– | Fixed in– |
AI-suggested
Red Hat has released updated container images for Keycloak 26.4.15 and its Operator that fix this vulnerability. Users should back up their existing installations, including applications, configurations, and databases, before applying the update. Applying the updated images is the recommended remediation. No alternative mitigations or workarounds are specified in the advisory.
Description
A critical security vulnerability (CVE-2026-18963) affects the Red Hat build of Keycloak 26.4.15 images used in OpenShift Container Platform. The flaw allows unauthenticated attackers to take over accounts by bypassing the reset-credentials flow. Red Hat has released updated container images to address this issue.