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CVE-2026-12856

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

Published: Jun 29, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-88
8.8HIGH
NVD MITRE
EPSS Score
0.3%
Top 78.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-88

Affected Products

Red Hat
commercial·USaka redhat
Red Hat OpenShift Dev Spaces 3.29On-prem
Operating Systems / linux-distro
openshift dev spacesOn-prem
Operating Systems / linux-distro

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Execution
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References

https://access.redhat.com/errata/RHSA-2026:36820
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-12856
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2491278
bugzilla.redhat.com
and 2 more references View all →

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