High 8.8Published Jun 29, 2026

CVE-2026-12856Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the vscode-java extension

Updated under an hour ago (Oct 27, 2026, 9:00 AM ET)

Does this affect you?

It affects Red Hat OpenShift Dev Spaces 3.29 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Red Hat OpenShift Dev Spaces 3.29

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-88
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat OpenShift Dev Spaces 3.29 redhat:openshift_devspaces	from 1782989367 not affected	CNA record
Red Hat Red Hat OpenShift Dev Spaces 3.29 redhat:openshift_devspaces	from 1782989367 not affected	CISA ADP
redhat openshift_dev_spaces redhat:openshift_dev_spaces	all versions	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:36820	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-12856	vdb-entry, x-refsource-redhat, mitigation, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2491278	issue-tracking, x-refsource-redhat, vendor-advisory
https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv	broken-link
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.