Advisory severityHigh7.5Apache Software Foundation

High [CVE-2026-50645 +1] incomplete fix for CVE-2026-50645 means that it is still possible to perform a denial of service attack on Apache CXF by sending a message with many attachment headers

This high-severity Apache Software Foundation advisory covers CVE-2026-64958 and CVE-2026-50645 affecting Apache CXF.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 2 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.

CVE-2026-64958 Source published Aug 6, 2026Source updated Aug 6, 2026

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

CVE-2026-50645 CVE-2026-64958

Affected products & platforms

Apache Software FoundationUnclassified

Open source advisory

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Summary

An incomplete fix for CVE-2026-50645 means that it is still possible to perform a denial of service attack on Apache CXF by sending a message with many attachment headers. 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

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-2026-50645 instead of the raw feed document.
CVE Program

Cross-references

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Official resources

ASF Security — reporting & CVE process
Official documentation
The Apache Software Foundation's official security page: how ASF CVEs are published and where each project's advisories live.
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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