CVE-2026-15803 XML external entity in Eclipse RDF4J
Attackers can exploit XML External Entity vulnerabilities in Eclipse RDF4J to read sensitive files or cause denial of service via untrusted XML input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15803?
CVE-2026-15803 is a high-severity vulnerability in Eclipse RDF4J, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-15803?
How do I fix CVE-2026-15803?
No fix has been published for CVE-2026-15803 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-15803 being exploited?
There is no known exploitation of CVE-2026-15803 in the wild and no public exploit code.
Sources
Also known as GHSA-jwq9-92hc-xq2j.