Skip to content
Fencer Vulns
high 7.5

CVE-2026-100227 json

Apache CXF: XML Signature wrapping in JAX-RS XML Security

published 2026-10-09 31 d ago modified 2026-10-16 23 d ago also EUVD-2026-95701

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module. The JAX-RS XML Signature interceptors (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor) did not ensure that the XML passed to the application was covered by the signature. An attacker with any document signed by a trusted key could wrap it in unsigned content, which the application would then treat as signed. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

Patch / fix

  • Apache Software Foundation Apache CXF 3.6.13, 4.1.9, 4.2.4

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-2026-100227 updated cvss 5.9

org.apache.cxf/cxf-rt-rs-security-xml: Apache CXF: Cryptographic signature verification bypass via unsigned XML wrapping

  • Red Hat build of Apache Camel for Spring Boot 4 cxf-rt-rs-security-xml 4.1.8.rhbac-redhat-00002
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Fuse 7 cxf-rt-rs-security-xml 4.1.8.rhbac-redhat-00002 Red Hat JBoss Web Server 5 cxf-rt-rs-security-xml 4.1.8.rhbac-redhat-00002
    affected: workaround, 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
24 d ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% 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 CXF

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.