{"id":"UBUNTU-CVE-2026-17615","details":"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.","modified":"2026-09-16T11:31:16Z","published":"2026-08-31T17:17:00Z","upstream":["CVE-2026-17615"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-17615"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-17615"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507635"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-17615"}],"affected":[{"package":{"name":"resteasy","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/resteasy?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.6-3","3.0.6-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy-java","binary_version":"3.0.6-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy3.0","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/resteasy3.0?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.19-1","3.0.19-2","3.0.26-1~18.04","3.0.26-1~18.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy3.0-java","binary_version":"3.0.26-1~18.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/resteasy?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-2","3.6.2-2ubuntu0.20.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy-java","binary_version":"3.6.2-2ubuntu0.20.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy3.0","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/resteasy3.0?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.26-1","3.0.26-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy3.0-java","binary_version":"3.0.26-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy3.0","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/resteasy3.0?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.26-2","3.0.26-3","3.0.26-3ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy3.0-java","binary_version":"3.0.26-3ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/resteasy?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-2","3.6.2-2ubuntu0.22.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy-java","binary_version":"3.6.2-2ubuntu0.22.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy3.0","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/resteasy3.0?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.26-6","3.0.26-6ubuntu0.24.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy3.0-java","binary_version":"3.0.26-6ubuntu0.24.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/resteasy?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-2","3.6.2-2ubuntu0.24.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libresteasy-java","binary_version":"3.6.2-2ubuntu0.24.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/resteasy?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-3","3.6.2-4"],"ecosystem_specific":{"binaries":[{"binary_version":"3.6.2-4","binary_name":"libresteasy-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-17615.json"}},{"package":{"name":"resteasy3.0","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg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