{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54525", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-15T18:40:01.651Z", "datePublished": "2026-10-14T19:06:59.440Z", "dateUpdated": "2026-10-14T19:06:59.440Z"}, "containers": {"cna": {"title": "Markdown Preview Enhanced: One Click RCE via Markdown Link Command Injection on Windows", "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "lang": "en", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/security/advisories/GHSA-7v6f-3vq6-r373", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/security/advisories/GHSA-7v6f-3vq6-r373"}, {"name": "https://github.com/shd101wyy/crossnote/pull/442", "tags": ["x_refsource_MISC"], "url": "https://github.com/shd101wyy/crossnote/pull/442"}, {"name": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/pull/2318", "tags": ["x_refsource_MISC"], "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/pull/2318"}, {"name": "https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee", "tags": ["x_refsource_MISC"], "url": "https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee"}, {"name": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77", "tags": ["x_refsource_MISC"], "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77"}, {"name": "https://github.com/shd101wyy/crossnote/releases/tag/0.9.29", "tags": ["x_refsource_MISC"], "url": "https://github.com/shd101wyy/crossnote/releases/tag/0.9.29"}, {"name": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28", "tags": ["x_refsource_MISC"], "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28"}], "affected": [{"vendor": "shd101wyy", "product": "vscode-markdown-preview-enhanced", "versions": [{"version": "< 0.8.28", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-14T19:06:59.440Z"}, "descriptions": [{"lang": "en", "value": "Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.28, Markdown Preview Enhanced preview-link handling passes a decoded, Markdown-controlled link target to a Windows file-opening helper that invokes child_process.exec with the start command. When a Windows user opens an untrusted Markdown file and clicks a crafted external or unsupported-scheme link, shell metacharacters in the decoded target are interpreted by cmd.exe as command separators, allowing an attacker-selected command to run with the privileges of the current VS Code user. The attack requires one normal preview-link click but does not require malicious workspace configuration, script execution to be enabled, or additional files. This issue is fixed in version 0.8.28."}], "source": {"advisory": "GHSA-7v6f-3vq6-r373", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "vscode-markdown-preview-enhanced", "vendor": "shd101wyy", "versions": [{"status": "affected", "version": "< 0.8.28"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.28, Markdown Preview Enhanced preview-link handling passes a decoded, Markdown-controlled link target to a Windows file-opening helper that invokes child_process.exec with the start command. When a Windows user opens an untrusted Markdown file and clicks a crafted external or unsupported-scheme link, shell metacharacters in the decoded target are interpreted by cmd.exe as command separators, allowing an attacker-selected command to run with the privileges of the current VS Code user. The attack requires one normal preview-link click but does not require malicious workspace configuration, script execution to be enabled, or additional files. This issue is fixed in version 0.8.28."}], "id": "CVE-2026-54525", "lastModified": "2026-10-14T19:17:17.480", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-14T19:17:17.480", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee"}, {"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/crossnote/pull/442"}, {"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/crossnote/releases/tag/0.9.29"}, {"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77"}, {"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/pull/2318"}, {"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28"}, {"source": "security-advisories@github.com", "url": "https://github.com/shd101wyy/vscode-markdown-preview-enhanced/security/advisories/GHSA-7v6f-3vq6-r373"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}