CVE-2026-50634 Apache CXF: WS JSON request filter trusts metadata from an unvalidated first signature entry
Attackers can bypass signature validation in Apache CXF by exploiting unvalidated metadata in JSON requests, potentially altering downstream processing logic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50634?
CVE-2026-50634 is a medium-severity vulnerability in Apache Cxf, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-347
Which versions are affected by CVE-2026-50634?
4 open source packages ship an affected version, including org.apache.cxf:cxf-rt-rs-security-jose-jaxrs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.cxf:cxf-rt-rs-security-jose-jaxrs Maven | All versions | 4.1.7 |
org.apache.cxf:cxf-rt-rs-security-jose-jaxrs Maven | All versions | 4.1.7 |
org.apache.cxf:cxf-rt-rs-security-jose-jaxrs Maven | From 4.2.0 | 4.2.2 |
org.apache.cxf:cxf-rt-rs-security-jose-jaxrs Maven | From 4.2.0 | 4.2.2 |
Products include Apache Cxf.
How do I fix CVE-2026-50634?
Upgrade org.apache.cxf:cxf-rt-rs-security-jose-jaxrs to a fixed version for your release line: 4.1.7 or 4.2.2.
Is CVE-2026-50634 being exploited?
There is no known exploitation of CVE-2026-50634 in the wild and no public exploit code.
Other vulnerabilities in Apache Cxf
- CVE-2012-2379 XML Signature/Encryption Not Validated in Apache CXF
- CVE-2026-66909 Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage
- CVE-2026-68079 Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replay
- CVE-2026-50628 Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control
- CVE-2025-48913 Apache CXF: Untrusted JMS configuration can lead to RCE
Sources
Also known as GHSA-33j8-j763-4fv5.