Advisory severityCritical9.8Apache Software Foundation

Critical [CVE-2026-66909] Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place

This critical-severity Apache Software Foundation advisory covers CVE-2026-66909 affecting Apache CXF.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-66909 Source published Aug 6, 2026Source updated Aug 7, 2026

VulniPulse record published Aug 6, 2026Record updated Aug 7, 2026

CVE-2026-66909

Affected products & platforms

Apache Software FoundationUnclassified

Open source advisory

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Summary

Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place.

Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed.

Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

Affected versions

Apache CXF 4.2.0 before 4.2.3
Apache CXF 4.0.0 before 4.1.8
Apache CXF before 3.6.12

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

4.2.3
4.1.8
3.6.12

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed.
Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-66909 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-66909NVD CVE.org MITRE

Official resources

ASF Security — reporting & CVE process
Official documentation
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Apache project downloads (fixed releases)
Official documentation
Official ASF download tree — fetch the fixed release named in this advisory from the project's directory.

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