CVE-2026-18963: Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 2 public reports, the first from .
- How likely is exploitation in the next 30 days?
- 4.7%
Down from 6.4% on .
EPSS score, percentile 91.8 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.1 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Unaffected 26.4.15-1; 26.4-23; 26.4-23; 26.6.6-1; 26.6-12; 26.6-12
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
Workaround (from the CVE record)
If an immediate upgrade is not possible, disabling the "Forgot password" functionality across all realms can be used as a temporary mitigation. In the RHBK administration console, navigate to: Realm settings → Login → Forgot password → Off Apply this setting to all realms. Upgrade to a fixed version as soon as possible.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (13 products)
| Status | Versions |
|---|---|
| Unaffected | 26.4.15-1 |
Versions not listed are: affected.
| Status | Versions |
|---|---|
| Unaffected | 26.4-23 |
Versions not listed are: affected.
| Status | Versions |
|---|---|
| Unaffected | 26.4-23 |
Versions not listed are: affected.
| Status | Versions |
|---|
Versions not listed are: unaffected.
| Status | Versions |
|---|
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Unaffected | 26.6.6-1 |
Versions not listed are: affected.
| Status | Versions |
|---|---|
| Unaffected | 26.6-12 |
Versions not listed are: affected.
| Status | Versions |
|---|---|
| Unaffected | 26.6-12 |
Versions not listed are: affected.
| Status | Versions |
|---|
Versions not listed are: unaffected.
| Status | Versions |
|---|
Versions not listed are: unaffected.
| Status | Versions |
|---|
Versions not listed are: unaffected.
| Status | Versions |
|---|
Versions not listed are: unaffected.
| Status | Versions |
|---|
Versions not listed are: affected.
Versions the record lists as unaffected: 26.4.15-1, 26.4-23, 26.6.6-1, 26.6-12.
Source: CVE List, as of . About the data.
Weakness
CWE-640
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
2
Known exploited Red Hat vulnerabilities
- CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability
- CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability
- CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability
- CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability
- CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability