High [CVE-2026-19611] Wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: password keyspace reduction via nfkc fullwidth folding
This high-severity Red Hat Linux advisory covers CVE-2026-19611 affecting Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Debezium 3, Red Hat Build of Keycloak.
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Summary
A flaw was found in WildFly Elytron. Password hashing and verification normalize input with Unicode NFKC, which can collapse fullwidth characters to ASCII equivalents.
A remote attacker can more easily guess affected passwords by using an ASCII-only dictionary against accounts whose passwords were intended to include those non-ASCII characters, leading to unauthorized access. This issue has Moderate impact.
Successful exploitation depends on accounts using fullwidth or other NFKC-compatibility characters in passwords and on the feasibility of password guessing against the deployed hash algorithm. Red Hat severity: Moderate — CVSS 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
Weakness: CWE-173.
Affected Red Hat products: Red Hat build of Apache Camel 4 for Quarkus 3; Red Hat build of Debezium 3; Red Hat Build of Keycloak; Red Hat build of Quarkus; Red Hat Data Grid 8; Red Hat JBoss Enterprise Application Platform 7; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack; Red Hat Single Sign-On 7.
Will not fix / out of support: Red Hat JBoss Enterprise Application Platform 7. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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