shd101wyy Markdown Preview Enhanced/crossnote window.eval eval injection

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k3.16-

Summaryinfo

A vulnerability classified as problematic has been found in shd101wyy Markdown Preview Enhanced and crossnote. Impacted is the function window.eval. The manipulation leads to eval injection. This vulnerability is documented as CVE-2026-11422. The attack needs to be performed locally. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in shd101wyy Markdown Preview Enhanced and crossnote (version now known). This issue affects the function window.eval. The manipulation with an unknown input leads to a eval injection vulnerability. Using CWE to declare the problem leads to CWE-95. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. "eval"). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Markdown Preview Enhanced 0.8.x with crossnote engine 0.9.28 contains a code injection vulnerability in the WaveDrom rendering pipeline that allows attackers to execute arbitrary JavaScript by embedding malicious content in a wavedrom fenced code block within a crafted Markdown document. Attackers can exploit the unsanitized passing of wavedrom block content to window.eval() in the VS Code webview context to abuse the extension's message passing and invoke arbitrary file writes on the local filesystem.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-11422 since 06/05/2026. The exploitation is known to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading eliminates this vulnerability. Applying the patch 5588ca2121c3da43fe331575dc5cf4ef347b91ee is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Eval injection
CWE: CWE-95 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Patch: 5588ca2121c3da43fe331575dc5cf4ef347b91ee

Timelineinfo

06/05/2026 CVE reserved
06/05/2026 +0 days VulDB entry created
06/06/2026 +0 days Advisory disclosed
06/06/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 2315
Status: Confirmed

CVE: CVE-2026-11422 (🔒)
GCVE (CVE): GCVE-0-2026-11422
GCVE (VulDB): GCVE-100-369011

Entryinfo

Created: 06/06/2026 00:09
Changes: 06/06/2026 00:09 (76)
Complete: 🔍
Cache ID: 216::103

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