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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-12856 Detail

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

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2026-12856 Inc., Red Hat, redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2491278 Inc., Red Hat, redhat-SADP
https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv Red Hat, Inc.
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json redhat-SADP

Weakness Enumeration

CWE-ID CWE Name Source
CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') redhat-SADP   Red Hat, Inc.  

Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-12856
NVD Published Date:
06/29/2026
NVD Last Modified:
06/30/2026
Source:
Red Hat, Inc.