Improper Handling of Alternate Encoding Affecting org.wildfly.security:wildfly-elytron-password-impl package, versions [0,2.6.10.SP1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGWILDFLYSECURITY-19665498
- published10 Sept 2026
- disclosed21 Aug 2026
- creditLiuBo-keep
Introduced: 21 Aug 2026
CVE-2026-19611 (opens in a new tab)How to fix?
Upgrade org.wildfly.security:wildfly-elytron-password-impl to version 2.6.10.SP1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Handling of Alternate Encoding in its password normalization, which applies Unicode NFKC (compatibility) normalization before hashing and so folds fullwidth and other compatibility characters to their ASCII equivalents. An attacker with access to the stored password hashes can shrink the effective keyspace and test ASCII dictionary candidates against passwords originally set with compatibility characters, since distinct inputs such as Ａ (U+FF21) and A (U+0041) produce the same hash. This affects only credentials whose passwords contain compatibility characters such as fullwidth letters or digits, and the attacker must already possess the hashes to run the offline dictionary attack.