# CVE-2026-15803

## Summary

- **CVE ID:** CVE-2026-15803
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-611, CWE-827
- **Published:** Aug 12, 2026
- **Last Modified:** Aug 13, 2026

## 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.

## Affected Products

- Eclipse Foundation — Eclipse RDF4J (0)

## References

- [CNA](https://rdf4j.org/release-notes/5.3.2/)
- [CNA](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/175)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 27.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._