CVE catalog
CVE-2026-12856
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 maliciou
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.55% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | openshift_dev_spaces | Not reported | Not reported | unknown |
| Cpe | openshift_dev_spaces | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:36820]
- [https://access.redhat.com/security/cve/CVE-2026-12856]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2491278]
- [https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-12856]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json]
[FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]