CVE-2026-12856

highCVSS 8.8covered by 1 sourcefirst seen 2026-06-29

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.

⚡ Watch CVE-2026-12856

Get an email if CVE-2026-12856 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Exploitation outlook

Low exploitation risk0.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-12856: A flaw was found in the vscode-java extension, which provides Java language support for Visual…nvd · 2026-06-29

External references

NVD record for CVE-2026-12856

CVE.org record

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2026-12856 status](https://www.csirts.com/badge/CVE-2026-12856)](https://www.csirts.com/cve/CVE-2026-12856)