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CVE-2026-17615

Resteasy-core: resteasy sourceprovider remote unauthenticated file read

Published: Aug 31, 2026Updated: Sep 16, 2026 Sources: CVE List NVDCWE-611
7.5HIGH
NVD MITRE
EPSS Score
0.3%
Top 71.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-611

Affected Products

Red Hat
commercial·US
Red Hat build of Keycloak 26.6On-prem
Security Products / identity-access-mgmt
Red Hat build of Keycloak 26.6.7On-prem
Operating Systems / linux-distro
Red Hat build of Apache Camel 4 for Quarkus 3LibraryLibrary
OSS Libraries / generic-library
Red Hat build of Apicurio Registry 3On-prem
DevTools & CI
Red Hat build of Debezium 3On-premLibrary
OSS Libraries / generic-library
Red Hat Enterprise Linux 8On-premOS
Operating Systems / linux-distro
Red Hat Fuse 7On-premDev Tool
DevTools & CI / ci-cd
Red Hat JBoss Enterprise Application Platform 8On-premWeb App
Enterprise Software / itsm-monitoring
and 3 more affected products View all →

Exploitability

Workaround Available
Is your org exposed to CVE-2026-17615?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Initial Access
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:62515
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:62555
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:63302
access.redhat.com
and 4 more references View all →

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