Bug 2514568 (CVE-2026-19611)

Summary:	CVE-2026-19611 wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: Password keyspace reduction via NFKC fullwidth folding
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abrianik, ant, anujha, aschwart, asoldano, aszczucz, avibelli, bbaranow, bgeorges, bmaxwell, boliveir, bstansbe, ccranfor, cescoffi, dandread, dkreling, dlofthou, drichtar, fmongiar, ggrzybek, gsmet, istudens, ivassile, iweiss, janstey, jmartisk, jnethert, jpechane, jraez, lthon, manderse, mosmerov, mposolda, msvehla, nwallace, olubyans, parichar, pberan, pesilva, pgallagh, pjindal, pmackay, probinso, rguimara, rmartinc, rruss, rstancel, rsvoboda, sbiarozk, ssilvert, sthorger, tasato, thjenkin, tqvarnst, vdosoudi, vmuzikar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	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.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-12 11:40:28 UTC

WildFly Elytron password implementations (wildfly-elytron-password-impl, all supported versions reported) apply Unicode Normalization Form KC (NFKC) in AbstractPasswordImpl.getNormalizedPasswordBytes() before hashing and verification (BCrypt, SCRAM, Unix crypts, and related). NFKC compatibility mapping collapses fullwidth Latin characters (e.g. U+FF01–U+FF5E) to their ASCII equivalents, so a password the user believed contained non-ASCII fullwidth characters is stored and verified as the ASCII form. An attacker can therefore match such passwords with an ASCII-only dictionary. This is older SASLprep-style processing; modern PRECIS OpaqueString (RFC 8265) uses NFC and does not width-map passwords. CWE-173.

Comment 2 Jon Orris 2026-09-22 14:02:21 UTC

This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.3.SP2

Via RHSA-2026:70257 https://access.redhat.com/errata/RHSA-2026:70257