{"id":"UBUNTU-CVE-2026-89058","details":"A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins (\"*\"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.","modified":"2026-09-23T23:36:46Z","published":"2026-09-18T08:17:00Z","upstream":["CVE-2026-89058"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-89058"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-89058"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2519775"},{"type":"REPORT","url":"https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3"},{"type":"REPORT","url":"https://redhat.atlassian.net/browse/RESTEASY-3796"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-89058"},{"type":"REPORT","url":"https://github.com/resteasy/resteasy/commit/efeb2b7"}],"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-2026-89058.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_version":"3.0.26-1~18.04.1~esm1","binary_name":"libresteasy3.0-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89058.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-2026-89058.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-2026-89058.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_version":"3.0.26-3ubuntu0.1","binary_name":"libresteasy3.0-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89058.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_version":"3.6.2-2ubuntu0.22.04.1~esm1","binary_name":"libresteasy-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89058.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_version":"3.0.26-6ubuntu0.24.04.1","binary_name":"libresteasy3.0-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89058.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_version":"3.6.2-2ubuntu0.24.04.1~esm1","binary_name":"libresteasy-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89058.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_name":"l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