CVE-2026-89238: Apache WSS4J

Critical severity, CVSS 9.1. EPSS: 0.3% chance of exploitation in the next 30 days.

WSS4J EncryptedHeader child confusion could promote an attacker-controlled plaintext element as the decrypted header, leading to incorrect confidentiality coverage and possible policy bypass. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

Affected products

• Apache WSS4J: before 2.4.4 (fixed in 2.4.4); from 3.0.0, before 3.0.6 (fixed in 3.0.6); from 4.0.0, before 4.0.2 (fixed in 4.0.2)

Published 2026-09-30. Last modified 2026-10-06.