9.1

CVE-2026-89238: apache software foundation apache wss4j

CVSS: 9.1v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-89238DEBIAN-CVE-2026-89238
Published 30-09-2026Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2026-89238 is a critical (CVSS 9.1) vulnerability in apache software foundation apache wss4j. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-09-2026
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

01-10-202618-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • wss4j< 2.4.4 | ≥ 3.0.0, < 3.0.6 | ≥ 4.0.0, < 4.0.2
Apache software foundation1 product
  • apache wss4j≥ 4.0.0, < 4.0.2 | ≥ 3.0.0, < 3.0.6 | < 2.4.4
Debian1 product
  • wss4jAll versions (No fix recorded)
Ubuntu1 product
  • wss4jAll versions (No fix recorded)

4 vendors · 4 products

References

5 links