Description
A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perform an unauthenticated remote file read. By sending a specially crafted XML body with a DOCTYPE declaration referencing external entities to an endpoint that accepts application/xml and returns Source or StreamSource, the server can be tricked into resolving the entity and including sensitive file contents in the HTTP response. This is due to the SourceProvider.writeTo() method creating a SAXParser without disabling external entity resolution, leading to an XML External Entity (XXE) vulnerability.
Published: 2026-08-31
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

To mitigate this issue, avoid exposing RESTEasy endpoints that return Source or StreamSource types. Alternatively, implement a custom MessageBodyWriter for Source types that explicitly applies XML security features to the SAXParserFactory before parsing. Changes to application configuration or code typically require an application redeployment or restart to take effect.

Tracking

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Advisories

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History

Mon, 31 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 31 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perform an unauthenticated remote file read. By sending a specially crafted XML body with a DOCTYPE declaration referencing external entities to an endpoint that accepts application/xml and returns Source or StreamSource, the server can be tricked into resolving the entity and including sensitive file contents in the HTTP response. This is due to the SourceProvider.writeTo() method creating a SAXParser without disabling external entity resolution, leading to an XML External Entity (XXE) vulnerability.
Title Resteasy-core: resteasy sourceprovider remote unauthenticated file read
First Time appeared Redhat
Redhat apicurio Registry
Redhat build Keycloak
Redhat camel Quarkus
Redhat debezium
Redhat enterprise Linux
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat jbosseapxp
Redhat quarkus
Redhat satellite
Weaknesses CWE-611
CPEs cpe:/a:redhat:apicurio_registry:3
cpe:/a:redhat:build_keycloak:
cpe:/a:redhat:camel_quarkus:3
cpe:/a:redhat:debezium:3
cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:quarkus:3
cpe:/a:redhat:satellite:6
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat apicurio Registry
Redhat build Keycloak
Redhat camel Quarkus
Redhat debezium
Redhat enterprise Linux
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat jbosseapxp
Redhat quarkus
Redhat satellite
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Subscriptions

Redhat Apicurio Registry Build Keycloak Camel Quarkus Debezium Enterprise Linux Jboss Enterprise Application Platform Jboss Fuse Jbosseapxp Quarkus Satellite
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-31T17:09:20.602Z

Reserved: 2026-07-27T19:28:37.735Z

Link: CVE-2026-17615

cve-icon Vulnrichment

Updated: 2026-08-31T17:09:15.767Z

cve-icon NVD

Status : Received

Published: 2026-08-31T17:17:37.717

Modified: 2026-08-31T18:17:13.723

Link: CVE-2026-17615

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T17:30:03Z

Weaknesses
  • CWE-611

    Improper Restriction of XML External Entity Reference