CVE-2026-49875: CWE-611 Improper Restriction of XML External Entity Reference in Apache Software Foundation Apache CXF
Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without the necessary JAXP hardening configurations, enabling out-of-band (OOB) external entity resolution. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue.
AI Analysis
Technical Summary
Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without applying necessary JAXP hardening configurations, enabling out-of-band external entity resolution. This improper restriction of XML external entity references (CWE-611) can lead to information disclosure. The vulnerability is identified as CVE-2026-49875 with a CVSS 3.1 base score of 6.5 (medium severity). The affected version explicitly stated is 4.2.0. Vendor advisories recommend upgrading to fixed versions 4.2.2 or 4.1.7 to remediate the issue.
Potential Impact
The vulnerability allows out-of-band external entity resolution, which can lead to information disclosure. The CVSS vector indicates network attack vector, low attack complexity, requires low privileges, no user interaction, and impacts confidentiality but not integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available by upgrading Apache CXF to versions 4.2.2 or 4.1.7, which include the necessary JAXP hardening configurations to prevent out-of-band external entity resolution. Users should apply these updates to remediate the vulnerability. Patch status is confirmed by vendor advisories. No additional mitigations are indicated.
CVE-2026-49875: CWE-611 Improper Restriction of XML External Entity Reference in Apache Software Foundation Apache CXF
Description
Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without the necessary JAXP hardening configurations, enabling out-of-band (OOB) external entity resolution. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue.
CVSS v3.1
Score 6.5medium
Affected software
pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without applying necessary JAXP hardening configurations, enabling out-of-band external entity resolution. This improper restriction of XML external entity references (CWE-611) can lead to information disclosure. The vulnerability is identified as CVE-2026-49875 with a CVSS 3.1 base score of 6.5 (medium severity). The affected version explicitly stated is 4.2.0. Vendor advisories recommend upgrading to fixed versions 4.2.2 or 4.1.7 to remediate the issue.
Potential Impact
The vulnerability allows out-of-band external entity resolution, which can lead to information disclosure. The CVSS vector indicates network attack vector, low attack complexity, requires low privileges, no user interaction, and impacts confidentiality but not integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available by upgrading Apache CXF to versions 4.2.2 or 4.1.7, which include the necessary JAXP hardening configurations to prevent out-of-band external entity resolution. Users should apply these updates to remediate the vulnerability. Patch status is confirmed by vendor advisories. No additional mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-02T08:45:53.536Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-49875","vendor":"Red Hat"}]
Threat ID: 6a2bd75be617e2d83448bfa6
Added to database: 06/12/2026, 09:54:35 UTC
Last enriched: 07/30/2026, 00:06:22 UTC
Last updated: 07/31/2026, 21:26:47 UTC
Views: 66
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