CVE-2026-6732

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Esto resulta en una denegaci\u00f3n de servicio (DoS), dejando el sistema o la aplicaci\u00f3n afectados no disponibles."}], "id": "CVE-2026-6732", "lastModified": "2026-11-05T22:18:53.580", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6732", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-24T10:53:00.163293Z", "version": "2.0.3"}}]}, "published": "2026-04-23T23:16:16.443", "references": [{"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:11503"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-6732"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461300"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-843"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Ariel Schon for reporting this issue.", "bugzilla": {"description": "libxml2: libxml2: Denial of Service via crafted XSD-validated document", "id": "2461300", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461300"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-843", "details": ["A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable."], "name": "CVE-2026-6732", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "libxml2", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "libxml2", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "libxml2", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libxml2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libxml2", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Fix deferred", "package_name": "libxml2", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-04-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-6732\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-6732\nhttps://gitlab.gnome.org/GNOME/libxml2/-/issues/1097\nhttps://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411"], "statement": "Per upstream:\n> It's NOT recommended to use this software to process untrusted data. There is a lot of ways that a malicious crafted xml could exploit a hidden vulnerability in the software.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 85.0, "confidence_source": "matching", "scores": [{"score": 85.0, "source": "matching"}]}, "original": {"product": "Red Hat JBoss Core Services", "source": "cna", "vendor": "Red Hat"}, "product": "jboss_core_services", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "libxml2", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "Red Hat OpenShift Container Platform 4", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_container_platform", "vendor": "redhat"}], "analysis": {"en": {"generated_at": "2026-04-28T07:14:37.243333+00:00", "value": {"mitigation_remediation": ["Install the latest libxml2 package provided by Red\u00a0Hat\u2019s security updates to address the type\u2011confusion flaw", "Reconfigure applications that perform XSD validation to disable or limit the use of internal entity references until a patched version is available", "Monitor application logs for unexpected crashes and review Red\u00a0Hat advisories for additional mitigation guidance"], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The flaw affects multiple Red\u00a0Hat products, including Red\u00a0Hat Enterprise Linux versions 6 through 10, Red\u00a0Hat JBoss\u00a0Core\u00a0Services, Red\u00a0Hat Hardened Images, and Red\u00a0Hat OpenShift Container Platform\u00a04. Systems running any of these distributions or containers with libxml2 can be impacted.", "description_and_impact": "A type\u2011confusion flaw in libxml2 occurs when the library processes an XSD\u2011validated document that contains an internal entity reference; the resulting error causes the application to crash. The vulnerability is classified as CWE\u2011843 and can be exploited by supplying a crafted XML file. The crash leads to a denial of service, making the affected system or application unavailable.", "risk_and_exploitability": "The CVSS score is 6.5, indicating moderate severity. The EPSS score is lower than 1%, meaning the likelihood of exploitation is low at this time. The vulnerability is not listed in CISA\u2019s KEV catalog. Based on the description, the attacker must be able to supply a malicious XSD document to an application that uses libxml2 for XML validation; this likely requires either local access or the ability to remotely feed XML to the target application. Upon successful exploitation, the system experiences a crash leading to a denial of service."}}}}, "created": "2026-04-27T20:20:53.792757+00:00", "updated": "2026-04-28T07:15:19.383238+00:00", "vendors": ["redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$jboss_core_services", "redhat$PRODUCT$libxml2", "redhat$PRODUCT$openshift_container_platform"]}