CVE-2026-12856

{"id": "CVE-2026-12856", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-12856", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-29T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "secalert@redhat.com", "affectedData": [{"cpes": ["cpe:/a:redhat:openshift_devspaces:3.29::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Dev Spaces 3.29", "versions": [{"status": "unaffected", "version": "1782989367", "lessThan": "*", "versionType": "rpm"}], "packageName": "devspaces/pluginregistry-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/a:redhat:openshift_devspaces:3.29::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Dev Spaces 3.29", "versions": [{"status": "unaffected", "version": "1782989367", "lessThan": "*", "versionType": "rpm"}], "packageName": "devspaces/pluginregistry-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}]}], "published": "2026-06-29T14:16:41.473", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:36820", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-12856", "tags": ["Mitigation", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491278", "tags": ["Issue Tracking", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv", "tags": ["Broken Link"], "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36820", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-12856", "tags": ["Mitigation", "Vendor Advisory"], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491278", "tags": ["Issue Tracking", "Vendor Advisory"], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json", "tags": ["Vendor Advisory"], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-88"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-88"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad en la extensi\u00f3n vscode-java, que proporciona soporte para el lenguaje Java para Visual Studio Code. La extensi\u00f3n conf\u00eda incorrectamente en todo el contenido Markdown en las vistas previas de JavaDoc, lo que permite que un archivo Java malicioso incluya comandos ocultos. Si un usuario hace clic en un enlace especialmente dise\u00f1ado dentro de una ventana emergente de vista previa de JavaDoc, un atacante puede ejecutar comandos arbitrarios de VS Code, lo que puede llevar a un compromiso total del sistema en espacios de trabajo de confianza."}], "lastModified": "2026-10-25T21:10:00.770", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:openshift_dev_spaces:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "99B8A88B-0B31-4CFF-AFD7-C9D3DDD5790D"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}