Vulnerability in Red Hat Build Of Keycloak
CVE-2026-18963
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.032 (87.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: -0.001
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/security/cve/CVE-2026-18963 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:56519 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:56523 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:56524 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:56520 (vendor-advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2026-18963?
- CVE-2026-18963 is a critical-severity vulnerability in Red Hat Build Of Keycloak, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 9.1/10. Published 2026-08-18.
- How severe is CVE-2026-18963?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-18963 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.