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HIGH

CVE-2026-19611

CVSS v3

7.4

HIGH

EPSS Score

0.9 %

exploit probability, as of 2026-10-17

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-19611 Red Hat Product Security4 products fixed · 10 known affected

    wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: Password keyspace reduction via NFKC fullwidth folding

    wildfly-elytron-password-impl as a component of Red Hat build of Apache Camel 4 for Quarkus 3 · wildfly-elytron-password-impl as a component of Red Hat build of Debezium 3 · keycloak/rhbk-openshift-rhel9 as a component of Red Hat Build of Keycloak

  • RHSA-2026:83612 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat build of Debezium 3.6.3 release

  • RHSA-2026:70257 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.3.SP2)

  • RHSA-2026:69440 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat build of Quarkus 3.33.3.SP2 release and security update

  • RHSA-2026:69470 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat build of Quarkus 3.27.5.SP2 release and security update

Full record on NVD

Description

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2026-08-20
Last Modified
2026-08-21

Frequently asked questions

What is 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.

Is CVE-2026-19611 actively exploited?

Active exploitation of CVE-2026-19611 has not been confirmed. Its EPSS score was 0.9% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-19611?

CVE-2026-19611 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

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