All vulnerabilities
CVE-2026-89238

Apache WSS4J: WSS4J EncryptedHeader child confusion causing wrong protected-header selection

Apache Software Foundation Apache WSS4J
Open in ThreatlineRecord JSON
CVSS
9.1Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.27%Chance of exploitation activity in the next 30 days, higher than 17% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4.0.2Also 3.0.6, 2.4.4CVE List
Published30 Sep 2026Updated 30 Sep 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 3

  • Apache WSS4Jaffected: 4.0.0 before 4.0.2CVE List
  • Apache WSS4Jaffected: 3.0.0 before 3.0.6CVE List
  • Apache WSS4Jaffected: all versions before 2.4.4CVE List

References 1