CVE-2026-89238 WSS4J - Broken Access Control

WSS4J contains an encrypted header child confusion vulnerability caused by attacker-controlled plaintext elements being promoted as decrypted headers, letting attackers bypass confidentiality policies, exploit requires crafted SOAP messages.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-345

Vendor fix

Upgrade to versions 4.0.2, 3.0.6, or 2.4.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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