Advisoriesby IbisRed HatCVE-2026-19611
A flaw was found in WildFly Elytron
No fix yet
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Build of Debezium 3.6 Product | all versions | No fix yet |
| Red Hat build of Keycloak 26.4.17 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat build of Keycloak 26.6.8 Product | all versions | No fix yet |
| all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-173
- www.cve.org/CVERecord?id=CVE-2026-19611
- nvd.nist.gov/vuln/detail/CVE-2026-19611
- access.redhat.com/errata/RHSA-2026:69440
- access.redhat.com/errata/RHSA-2026:69470
- access.redhat.com/errata/RHSA-2026:70257
- access.redhat.com/errata/RHSA-2026:83612
- access.redhat.com/errata/RHSA-2026:95759
- access.redhat.com/errata/RHSA-2026:95760
- access.redhat.com/errata/RHSA-2026:95761
- access.redhat.com/errata/RHSA-2026:95762
- access.redhat.com/errata/RHSA-2026:95887
- access.redhat.com/security/cve/CVE-2026-19611
- bugzilla.redhat.com/show_bug.cgi?id=2514568