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{"bugzilla": {"description": "libexpat: libexpat: Information disclosure and arbitrary code execution via integer overflow", "id": "2491188", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491188"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-190", "details": ["libexpat before 2.8.2 has an integer overflow in getAttributeId.", "A flaw was found in libexpat. An integer overflow vulnerability exists within the `getAttributeId` function. This flaw could allow an attacker to potentially disclose sensitive information or execute arbitrary code, leading to a compromise of the system's integrity and confidentiality."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, Red Hat recommends avoiding the processing of untrusted or unvalidated XML input with applications utilizing libexpat. Implementing strict input validation and sanitization for all XML data originating from untrusted sources can reduce the risk of exploitation. This operational control helps prevent the vulnerable `getAttributeId` function from processing malicious input."}, "name": "CVE-2026-56405", "package_state": [{"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Fix deferred", "package_name": "exploit-intelligence-tech-preview/vulnerability-analysis-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/lightspeed-chatbot-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/lightspeed-chatbot-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "expat", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "compat-expat1", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "expat", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "expat", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "expat", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "mingw-expat", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "expat", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Fix deferred", "package_name": "libexpat-2.dll", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-llama-stack-core-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-mlflow-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-06-21T15:47:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56405\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56405\nhttps://github.com/libexpat/libexpat/pull/1251"], "statement": "The moderate vulnerability in libexpat's `getAttributeId` function could allow a local attacker to achieve information disclosure or arbitrary code execution due to an integer overflow. The high attack complexity and local access required inherently mitigate the opportunity for successful exploitation. However, successful exploitation could compromise system integrity and confidentiality in Red Hat products that process untrusted XML input using libexpat.", "threat_severity": "Moderate"}