CVE-2026-19611
Full vulnerability record from the local CVENow database.
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.
Severity
HIGH
CVSS score
7.4
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-20 16:17:18.293000
Last modified
2026-10-26 10:10:00.140000
View original CVE JSON
{
"id": "CVE-2026-19611",
"sourceIdentifier": "[email protected]",
"published": "2026-08-20T16:17:18.293",
"lastModified": "2026-10-26T10:10:00.140",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "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."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
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"packageName": "org.wildfly.security/wildfly-elytron-password-impl",
"cpes": [
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],
"versions": [
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"lessThan": "*",
"versionType": "rpm",
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}
]
},
{
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{
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{
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{
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"packageName": "jboss-eap-7/eap74-els-openjdk17-openshift-rhel8",
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{
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{
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{
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],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.2,
"impactScore": 5.2
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-21T16:38:31.494304Z",
"id": "CVE-2026-19611",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-173"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:69440",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:69470",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:70257",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:83612",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-19611",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514568",
"source": "[email protected]"
}
]
}