Eclipse RDF4J up to 5.3.1 XML Parser xml external entity reference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k3.54+

Summaryinfo

A vulnerability classified as critical has been found in Eclipse RDF4J up to 5.3.1. The affected element is an unknown function of the component XML Parser. The manipulation leads to xml external entity reference. This vulnerability is uniquely identified as CVE-2026-15803. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Eclipse RDF4J up to 5.3.1. It has been rated as critical. This issue affects some unknown processing of the component XML Parser. The manipulation with an unknown input leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at rdf4j.org. The identification of this vulnerability is CVE-2026-15803 since 07/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 5.3.2 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: RDF4J 5.3.2

Timelineinfo

07/15/2026 CVE reserved
08/12/2026 +28 days Advisory disclosed
08/12/2026 +0 days VulDB entry created
08/12/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: rdf4j.org
Status: Confirmed

CVE: CVE-2026-15803 (🔒)
GCVE (CVE): GCVE-0-2026-15803
GCVE (VulDB): GCVE-100-389087

Entryinfo

Created: 08/12/2026 18:19
Changes: 08/12/2026 18:19 (54)
Complete: 🔍
Cache ID: 216::103

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