CVE-2026-17615

Resteasy-core: resteasy sourceprovider remote unauthenticated file read

publishedCWE-611

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.

Technical severity7.5 highCVSS 3.1 · CNA: redhat

Published2026-08-31Source updated 2026-11-04

Collected2026-11-042 attributed sources

Fixes and workarounds

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.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Build of Apache Camel 3.33.3.SP1 Red Hat `org.jboss.resteasy/resteasy-core` https://access.redhat.com/downloads/content/package-browser/	≥ 6.2.16.Final-redhat-00003; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6 Red Hat `rhbk/keycloak-operator-bundle` https://catalog.redhat.com/software/containers/	≥ 26.6.7-3; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6 Red Hat `rhbk/keycloak-rhel9` https://catalog.redhat.com/software/containers/	≥ 26.6-20; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6 Red Hat `rhbk/keycloak-rhel9-operator` https://catalog.redhat.com/software/containers/	≥ 26.6-20; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6.7 Red Hat `keycloak/rhbk-rhel9-operator` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6.7 Red Hat `resteasy-core` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6.7 Red Hat `rhbk/keycloak-rhel9-operator` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6.7 Red Hat `rhbk-keycloak-rhel9-operator/rhbk-keycloak-rhel9-operator` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6.7 Red Hat `rhbk-rhel9-operator/rhbk-rhel9-operator` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Quarkus 3.27.5.SP1 Red Hat `org.jboss.resteasy/resteasy-core` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	≥ 6.2.12.Final-redhat-00003; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Quarkus 3.33.3.SP1 Red Hat `org.jboss.resteasy/resteasy-core` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	≥ 6.2.16.Final-redhat-00003; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `resteasy` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.0.26-20.el9_8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat `resteasy` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.0.26-16.el9_2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat `resteasy` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.0.26-20.el9_4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat `resteasy` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.0.26-20.el9_6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 8.1 Red Hat `resteasy-core` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Apache Camel 4 for Quarkus 3 Red Hat `resteasy-core` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat build of Apicurio Registry 3 Red Hat `resteasy-core` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat build of Debezium 3 Red Hat `resteasy-core` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `pki-core:10.6/resteasy` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `pki-deps:10.6/resteasy` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Fuse 7 Red Hat `resteasy-core` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 8 Red Hat `resteasy-core` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform Expansion Pack Red Hat `resteasy-core` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: affected	CNA: redhat
Red Hat Satellite 6 Red Hat `candlepin` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 7.5 high	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:62515CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:62555CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:63302CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:68277CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:68278CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72424CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:77297CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:80505CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:90894CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:95221CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-17615CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507635CNA: redhat · issue-tracking, x_refsource_REDHAT

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