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Vulnerability record · CVE-2026-15803 · published 12 August 2026

CVE-2026-15803: XML external entity (XXE) vulnerability

In Eclipse RDF4J, several XML parser entry points do not fully restrict XML External Entity (XXE) processing when parsing untrusted XML-based RDF data or query results, permitting DOCTYPE declarations, external entity references, and external DTD loading. This is due to an incomplete fix for CVE-2018-1000644: the earlier fix did not cover all parser entry points. The issue is resolved in RDF4J 5.3.2, which rejects or disables DOCTYPE declarations, external entities, and external DTD loading by default.

8.7 CVSS 4.0 High EPSS 0.47% · top 61.7% CWE-611 · XML external entity (XXE)CWE-827 · CWE-827 Awaiting Analysis
8.7CVSS 4.0 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
18 Aug 2026Last modified by NVD

Description

In Eclipse RDF4J, several XML parser entry points do not fully restrict XML External Entity (XXE) processing when parsing untrusted XML-based RDF data or query results, permitting DOCTYPE declarations, external entity references, and external DTD loading. This is due to an incomplete fix for CVE-2018-1000644: the earlier fix did not cover all parser entry points. The issue is resolved in RDF4J 5.3.2, which rejects or disables DOCTYPE declarations, external entities, and external DTD loading by default.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/175
https://rdf4j.org/release-notes/5.3.2/

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Source: NIST National Vulnerability Database (record CVE-2026-15803), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.