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Fencer Vulns
medium 6.5

CVE-2026-50634 json

Apache CXF: WS JSON request filter trusts metadata from an unvalidated first signature entry

published 2026-06-12 4 mo ago modified 2026-11-05 4 d ago also GHSA-33j8-j763-4fv5 , EUVD-2026-36402

cvss
6.5
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 20%
public exploits
0
none known

Summary

A vulnerability in Apache CXF's JwsJsonContainerRequestFilter can be exploited to cause CXF to process metadata that was not authenticated by the accepted signature. This can bypass the application's assumption

that accepted `Content-Type` or protected HTTP-header metadata came from a verified signature entry, and may steer downstream JAX-RS entity parsing or signed-header consistency checks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fix this issue.

Patch / fix

  • maven org.apache.cxf:cxf-rt-rs-security-jose-jaxrs 4.1.7, 4.2.2
  • Apache Software Foundation Apache CXF 3.6.12, 4.1.7, 4.2.2

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-2026-50634 updated cvss 5.3

org.apache.cxf/cxf-rt-rs-security-jose-jaxrs: Apache CXF: Signature bypass due to unauthenticated metadata processing in JwsJsonContainerRequestFilter

  • Red Hat build of Apache Camel for Spring Boot 4 cxf-rt-rs-security-jose-jaxrs Red Hat Fuse 7 cxf-rt-rs-security-jose-jaxrs Red Hat JBoss Enterprise Application Platform Expansion Pack cxf-rt-rs-security-jose-jaxrs Red Hat JBoss Web Server 5 cxf-rt-rs-security-jose-jaxrs
    not affected: vulnerable code not present

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
4 mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.cxf:cxf-rt-rs-security-jose-jaxrs
>=4.2.0, <4.2.2
<4.1.7
4.2.2
4.1.7

Affected products

  • Apache Software Foundation Apache CXF

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

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.