PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-49875 Apache Software Foundation CVE debrief

CVE-2026-49875 is a vulnerability in Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes. These classes construct a SAXParserFactory without the necessary JAXP hardening configurations, which enables out-of-band (OOB) external entity resolution. This vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-49875) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-49875).

Vendor
Apache Software Foundation
Product
Apache CXF
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-08-07
Advisory published
2026-06-12
Advisory updated
2026-08-07

Who should care

Users of Apache CXF are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue.

Technical summary

Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without the necessary JAXP hardening configurations, enabling out-of-band (OOB) external entity resolution.

Defensive priority

high

Recommended defensive actions

  • Upgrade to Apache CXF version 4.2.2 or 4.1.7.

Evidence notes

The CVE was published on [resourceLinkAnnotations:cve-org] and additional details can be found on [resourceLinkAnnotations:nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49875 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49875

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49875 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49875

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.