XML External Entity (XXE) Injection Affecting pki-resteasy-client package, versions <0:3.0.26-20.el9_6


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.62% (49th percentile)

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  • Snyk IDSNYK-RHEL9-PKIRESTEASYCLIENT-20689989
  • published9 Oct 2026
  • disclosed31 Aug 2026

Introduced: 31 Aug 2026

CVE-2026-17615  (opens in a new tab)
CWE-611  (opens in a new tab)

How to fix?

Upgrade RHEL:9 pki-resteasy-client to version 0:3.0.26-20.el9_6 or higher.
This issue was patched in RHSA-2026:77297.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pki-resteasy-client package and not the pki-resteasy-client package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1