Bug 2511978 (CVE-2026-64958)

Summary: CVE-2026-64958 org.apache.cxf/cxf: Apache CXF: Denial of service via many attachment headers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: anujha, aschwart, asoldano, aszczucz, bbaranow, bmaxwell, boliveir, bstansbe, csutherl, dlofthou, drichtar, dsoumis, fmariani, fmongiar, gmalinko, istudens, ivassile, iweiss, janstey, jclere, jnethert, jwon, mcarlett, mosmerov, mposolda, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, plodge, pmackay, rmartinc, rmaucher, rstancel, rstepani, ssilvert, sthorger, szappis, tcunning, thjenkin, vdosoudi, vmuzikar, yfang
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Apache CXF. This vulnerability allows a remote attacker to perform a denial of service (DoS) attack by sending a message with an excessive number of attachment headers. This can lead to the affected system becoming unresponsive or unavailable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-06 11:11:15 UTC
An incomplete fix forĀ 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.