CVE-2026-54701

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Source
https://cve.org/CVERecord?id=CVE-2026-54701
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54701.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54701
Aliases
  • GHSA-mcwg-4j78-qwv3
Published
2026-10-14T19:11:51Z
Modified
2026-10-28T02:31:00Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Markdown Preview Enhanced: Stored XSS via Unsanitized `.crossnote/head.html` Injection in Webview
Details

Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.30, Markdown Preview Enhanced reads repository-controlled .crossnote/head.html content and passes it through resolvePathsInHeader before inserting it into the head of the preview webview document without removing executable content. Script-capable markup executes while the document loads, before the React application and DOMPurify initialize, and can access acquireVsCodeApi to send messages from the webview to the extension host. Opening a Markdown preview in a malicious repository is sufficient to trigger the injected content, and no additional click within the notification or preview is required. This issue is fixed in version 0.8.30.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54701.json"
}
References

Affected packages

Git / github.com/shd101wyy/crossnote

Affected ranges

Type
GIT
Repo
https://github.com/shd101wyy/crossnote
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8c55a2ba3365712a1caa4abeece0383bc2994d48
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "8c55a2ba3365712a1caa4abeece0383bc2994d48"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "0.9.31",
            "range": [
                {
                    "fixed": "8c55a2ba3365712a1caa4abeece0383bc2994d48"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}
Type
GIT
Repo
https://github.com/shd101wyy/vscode-markdown-preview-enhanced
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8bc848b6cbb42b9f35a0f95f7c3bf29b8302970e
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.8.30"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "8bc848b6cbb42b9f35a0f95f7c3bf29b8302970e"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "0.8.30",
            "range": [
                {
                    "fixed": "8bc848b6cbb42b9f35a0f95f7c3bf29b8302970e"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.8.30"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

0.*
0.0.8
0.0.9
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.2.1
0.2.2
0.2.3
0.2.4
0.2.5
0.2.6
0.2.7
0.2.8
0.2.9
0.3.0
0.3.1
0.3.10
0.3.11
0.3.12
0.3.13
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.4.0
0.4.1
0.4.2
0.4.3
0.5.0
0.5.1
0.7.10
0.7.7
0.7.8
0.7.9
0.8.0
0.8.1
0.8.10
0.8.11
0.8.12
0.8.13
0.8.14
0.8.15
0.8.16
0.8.17
0.8.18
0.8.19
0.8.2
0.8.20
0.8.21
0.8.22
0.8.23
0.8.24
0.8.25
0.8.26
0.8.27
0.8.28
0.8.29
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
0.9.0
0.9.1
0.9.10
0.9.11
0.9.12
0.9.13
0.9.14
0.9.15
0.9.16
0.9.17
0.9.18
0.9.19
0.9.2
0.9.20
0.9.21
0.9.22
0.9.23
0.9.24
0.9.25
0.9.26
0.9.27
0.9.28
0.9.29
0.9.3
0.9.30
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9
v0.*
v0.3.12
v0.3.13
v0.4.1
v0.4.2
v0.4.3
v0.5.1
v0.5.10
v0.5.11
v0.5.12
v0.5.13
v0.5.14
v0.5.15
v0.5.16
v0.5.17
v0.5.18
v0.5.2
v0.5.20
v0.5.21
v0.5.22
v0.5.3
v0.5.4
v0.5.8
v0.5.9
v0.6.0
v0.6.1
v0.6.10
v0.6.2
v0.6.3
v0.6.5
v0.6.6
v0.6.7
v0.6.8
v0.7.0
v0.7.1
v0.7.2
v0.7.3
v0.7.4
v0.7.5
v0.7.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54701.json"