CVEvulnerability
CVE-2026-12856
8.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-06-29
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-88
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 configurations
• redhat openshift dev spaces
Related
Weakness · CWE (1)
- CWE-88 Improper Neutralization of Argument Delimiters in a Command weakness
References
- https://access.redhat.com/errata/RHSA-2026:36820 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-12856 Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2491278 Issue Tracking, Vendor Advisory
- https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv Broken Link
- https://access.redhat.com/errata/RHSA-2026:36820 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-12856 Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2491278 Issue Tracking, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json Vendor Advisory