{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93990.json" } ], "title": "expat: Expat: XML Injection via Malformed UTF-16 Input", "tracking": { "current_release_date": "2026-09-22T22:13:57+00:00", "generator": { "date": "2026-09-22T22:13:57+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.4.0" } }, "id": "CVE-2026-93990", "initial_release_date": "2026-09-19T22:58:11.224000+00:00", "revision_history": [ { "date": "2026-09-19T22:58:11.224000+00:00", "number": "1", "summary": "Initial version" }, { "date": "2026-09-22T21:55:22+00:00", "number": "2", "summary": "Current version" }, { "date": "2026-09-22T22:13:57+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat OpenShift Container Platform 4", "product": { "name": "Red Hat OpenShift Container Platform 4", "product_id": "red_hat_openshift_container_platform_4", "product_identification_helper": { "cpe": "cpe:/a:redhat:openshift:4" } } } ], "category": "product_family", "name": "Red Hat OpenShift Container Platform 4" }, { "category": "product_version", "name": "openshift/ose-rhel-coreos-8", "product": { "name": "openshift/ose-rhel-coreos-8", "product_id": "openshift/ose-rhel-coreos-8", "product_identification_helper": { "purl": "pkg:oci/ose-rhel-coreos-8?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-8" } } }, { "category": "product_version", "name": "openshift/ose-rhel-coreos-9", "product": { "name": "openshift/ose-rhel-coreos-9", "product_id": "openshift/ose-rhel-coreos-9", "product_identification_helper": { "purl": "pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9" } } } ], "category": "vendor", "name": "Red Hat" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4", "product_id": "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8" }, "product_reference": "openshift/ose-rhel-coreos-8", "relates_to_product_reference": "red_hat_openshift_container_platform_4" }, { "category": "default_component_of", "full_product_name": { "name": "openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4", "product_id": "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" }, "product_reference": "openshift/ose-rhel-coreos-9", "relates_to_product_reference": "red_hat_openshift_container_platform_4" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-93990", "cwe": { "id": "CWE-91", "name": "XML Injection (aka Blind XPath Injection)" }, "discovery_date": "2026-09-22T21:50:24.320578+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2538967" } ], "notes": [ { "category": "description", "text": "A flaw was found in Expat. This vulnerability allows a remote attacker to send specially crafted UTF-16 encoded XML data. Due to improper validation of surrogate characters, the parser can be tricked into accepting malformed sequences, which can hide legitimate markup characters. This could enable XML injection attacks, potentially leading to information disclosure or other integrity impacts.", "title": "Vulnerability description" }, { "category": "summary", "text": "expat: Expat: XML Injection via Malformed UTF-16 Input", "title": "Vulnerability summary" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "known_affected": [ "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2026-93990" }, { "category": "external", "summary": "RHBZ#2538967", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2538967" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-93990", "url": "https://www.cve.org/CVERecord?id=CVE-2026-93990" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-93990", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93990" }, { "category": "external", "summary": "https://github.com/libexpat/libexpat", "url": "https://github.com/libexpat/libexpat" }, { "category": "external", "summary": "https://github.com/libexpat/libexpat/commit/ff6e1d7e750bbe245178f51a47a965dc8342861a", "url": "https://github.com/libexpat/libexpat/commit/ff6e1d7e750bbe245178f51a47a965dc8342861a" }, { "category": "external", "summary": "https://github.com/libexpat/libexpat/pull/1282", "url": "https://github.com/libexpat/libexpat/pull/1282" }, { "category": "external", "summary": "https://www.vulncheck.com/advisories/expat-through-2.8.4-malformed-utf-16-acceptance-via-unchecked-surrogate", "url": "https://www.vulncheck.com/advisories/expat-through-2.8.4-malformed-utf-16-acceptance-via-unchecked-surrogate" } ], "release_date": "2026-09-19T22:58:11.224000+00:00", "remediations": [ { "category": "none_available", "details": "Affected", "product_ids": [ "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1" }, "products": [ "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ] } ], "threats": [ { "category": "impact", "details": "Important", "product_ids": [ "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ] } ], "title": "expat: Expat: XML Injection via Malformed UTF-16 Input" } ] }