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CRITICAL

CVE-2026-89238

CVSS v3

9.1

CRITICAL

EPSS Score

0.2 %

exploit probability, as of 2026-10-01

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2026-09-30
Last Modified
2026-09-30

Frequently asked questions

What is CVE-2026-89238?

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.

Is CVE-2026-89238 actively exploited?

Active exploitation of CVE-2026-89238 has not been confirmed. Its EPSS score was 0.2% on 2026-10-01, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-89238?

CVE-2026-89238 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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