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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
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.
Metrics
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[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces 3.29","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"]}]
[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces 3.29","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"devspaces/pluginregistry-rhel9","cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"],"versions":[{"version":"1782989367","lessThan":"*","versionType":"rpm","status":"unaffected"}]}]
CVE Modified by redhat-SADP7/09/2026 9:16:50 AM
Action
Type
Old Value
New Value
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Reference
https://access.redhat.com/errata/RHSA-2026:36820
Changed
Affected
[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_devspaces:3"]}]
[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces 3.29","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"]}]
CVE Modified by Red Hat, Inc.7/08/2026 2:16:31 PM
Action
Type
Old Value
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Reference
https://access.redhat.com/errata/RHSA-2026:36820
Changed
Affected
[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"devspaces/pluginregistry-rhel9","cpes":["cpe:/a:redhat:openshift_devspaces:3"]}]
[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces 3.29","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"devspaces/pluginregistry-rhel9","cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"],"versions":[{"version":"1782989367","lessThan":"*","versionType":"rpm","status":"unaffected"}]}]
Initial Analysis by NIST7/07/2026 11:35:56 PM
Action
Type
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CPE Configuration
OR
*cpe:2.3:a:redhat:openshift_dev_spaces:-:*:*:*:*:*:*:*
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-12856 Types: Mitigation, Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2491278 Types: Issue Tracking, Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv Types: Broken Link
New CVE Received from Red Hat, Inc.6/29/2026 10:16:41 AM
Action
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Old Value
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Description
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.
[{"vendor":"Red Hat","product":"Red Hat OpenShift Dev Spaces","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"devspaces/pluginregistry-rhel9","cpes":["cpe:/a:redhat:openshift_devspaces:3"]}]
Quick Info
CVE Dictionary Entry: CVE-2026-12856 NVD
Published Date: 06/29/2026 NVD
Last Modified: 07/14/2026
Source: Red Hat, Inc.
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