CVE-2026-15803
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductEclipse RDF4J
PublishedAug 12, 2026
First seenAug 12, 2026
Weakness typeCWE-611XML external entity (XXE)CWE-827CWE-827
How to fix
Update
- Eclipse Foundation Eclipse RDF4J5.3.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Eclipse Foundation Eclipse RDF4J | v < 5.3.2 | 5.3.2 |
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