CVE-2026-12856highCWE-88

CVE-2026-12856: high-severity vulnerability in Red Hat OpenShift Dev Spaces 3.29

Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the vscode-java extension

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Red Hat · Red Hat OpenShift Dev Spaces 3.29