Code Injection Vulnerability in MdEditor for Vue 3 by imzbf
CVE-2026-84992

6.1MEDIUM

Key Information:

Vendor

Imzbf

Status
Md-editor-v3
Vendor
CVE Published:
18 September 2026

What is CVE-2026-84992?

MdEditor, a Markdown editor designed for Vue 3, introduced a vulnerability where the highlight callback within its rendering process fails to properly escape or quote fenced-code language values. This flaw allows attackers to inject malicious JavaScript through crafted Markdown content. When a victim renders such Markdown, it could lead to JavaScript execution within the application's origin, potentially resulting in stored cross-site scripting (XSS) attacks. The issue has been addressed in version 6.5.4, which provides enhanced security measures to mitigate this risk.

Affected Version(s)

md-editor-v3 < 6.5.4

References

https://github.com/imzbf/md-editor-v3/security/advisories...
x_refsource_CONFIRM
https://github.com/imzbf/md-editor-v3/commit/2c07360420e7...
x_refsource_MISC
https://github.com/imzbf/md-editor-v3/releases/tag/v6.5.4
x_refsource_MISC

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.