8.8
High
CVE-2026-12856 A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat OpenShift Dev Spaces | Versions not published | |
| Red Hat OpenShift Dev Spaces 3.29 1782989367 | earliest → < 1782989367 | 1782989367 |
References
- RHSA-2026:36820 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2491278 bugzilla.redhat.com
- github.com github.com
Timeline
- Published
- Last modified
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