CVE-2026-19611

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:69440
https://access.redhat.com/errata/RHSA-2026:69470
https://access.redhat.com/errata/RHSA-2026:70257
https://access.redhat.com/errata/RHSA-2026:83612
https://access.redhat.com/security/cve/CVE-2026-19611
https://bugzilla.redhat.com/show_bug.cgi?id=2514568

Configurations

No configuration.

History

26 Oct 2026, 10:10

Type	Values Removed	Values Added
Summary		(es) Se encontró un fallo en WildFly Elytron. El hash y la verificación de contraseñas normalizan la entrada con Unicode NFKC, lo que puede colapsar caracteres de ancho completo a sus equivalentes ASCII. Un atacante remoto puede adivinar más fácilmente las contraseñas afectadas al usar un diccionario exclusivamente ASCII contra cuentas cuyas contraseñas estaban destinadas a incluir esos caracteres no ASCII, lo que lleva a un acceso no autorizado.

15 Oct 2026, 17:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:83612 -

09 Oct 2026, 00:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:69440 - () https://access.redhat.com/errata/RHSA-2026:70257 -

21 Sep 2026, 18:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:69470 -

Information

Published : 2026-08-20 16:17

Updated : 2026-10-26 10:10

NVD link : CVE-2026-19611

Mitre link : CVE-2026-19611

CVE.ORG link : CVE-2026-19611

JSON object : View

Products Affected

No product.

CWE

CWE-173

Improper Handling of Alternate Encoding

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