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Fencer Vulns
high 7.5

CVE-2026-92121 json

Apache WSS4J: WS-SecurityPolicy signature checks skipped in the streaming code after an STR-Transform reference

published 2026-09-30 39 d ago modified 2026-10-06 33 d ago also EUVD-2026-89795

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

In the WSS4J streaming (StAX) code, a signature reference using the WS-Security STR-Transform leaves an internal "inside signed content" flag permanently set. The WS-SecurityPolicy enforcer uses that flag to decide whether an element needs checking, so it stops evaluating SignedParts and SignedElements for the rest of the message. A policy requiring the SOAP Body to be signed is then satisfied even when the Body carries no signature, removing the protection against XML Signature Wrapping. Signature verification itself is unaffected. The DOM code is not affected.  Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4 which fix this issue.

Patch / fix

  • Apache Software Foundation Apache WSS4J 2.4.4, 3.0.6, 4.0.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-92121 updated cvss 5.9

wss4j: org.apache.wss4j/wss4j-ws-security-policy-stax: org.apache.wss4j/wss4j-ws-security-stax: org.apache.wss4j/wss4j: Apache WSS4J: Security policy bypass via STR-Transform reference

  • Red Hat build of Apache Camel 4 for Quarkus 3 wss4j-ws-security-stax 4.0.1.redhat-00003, wss4j-ws-security-policy-stax 4.0.1.redhat-00003 Red Hat build of Apache Camel for Spring Boot 4 wss4j 4.0.1.redhat-00003, wss4j-ws-security-stax 4.0.1.redhat-00003, wss4j-ws-security-policy-stax 4.0.1.redhat-00003
    affected: no fix available “Fix deferred”
  • Red Hat Fuse 7 wss4j 4.0.1.redhat-00003, wss4j-ws-security-stax 4.0.1.redhat-00003, wss4j-ws-security-policy-stax 4.0.1.redhat-00003 Red Hat JBoss Enterprise Application Platform 7 wss4j 4.0.1.redhat-00003, wss4j-ws-security-stax 4.0.1.redhat-00003, jboss-eap-7/eap74-els-openjdk8-openshift-rhel8, jboss-eap-7/eap74-els-openjdk11-openshift-rhel8, jboss-eap-7/eap74-els-openjdk17-openshift-rhel8, wss4j-ws-security-policy-stax 4.0.1.redhat-00003
    affected: no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform 8 wss4j-ws-security-stax 4.0.1.redhat-00003, wss4j-ws-security-policy-stax 4.0.1.redhat-00003 Red Hat JBoss Enterprise Application Platform Expansion Pack wss4j-ws-security-stax 4.0.1.redhat-00003, wss4j-ws-security-policy-stax 4.0.1.redhat-00003
    affected: no fix available “Fix deferred”
  • Red Hat Single Sign-On 7 wss4j-ws-security-stax 4.0.1.redhat-00003, wss4j-ws-security-policy-stax 4.0.1.redhat-00003
    affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
39 d ago

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Apache Software Foundation Apache WSS4J

Classification

Weakness
  • CWE-693 Protection Mechanism Failure

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.