Vulnerability · Published Aug 12, 2026 · Assigned by eclipse
CVE-2026-15803
High 8.7
In plain English
A high-severity XML external entity in Eclipse RDF4J from Eclipse Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rdf4j | no fix listed | DEBIAN-CVE-2026-15803 |
| Debian:13 | rdf4j | no fix listed | DEBIAN-CVE-2026-15803 |
| Debian:14 | rdf4j | no fix listed | DEBIAN-CVE-2026-15803 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Eclipse Foundation | Eclipse RDF4J | 0 – before 5.3.2 |
Weakness: CWE-611, CWE-827 · Vector: 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