{"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":"2026-10-15T15:05:57.227Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T13:53:20.006714Z","id":"CVE-2026-54525","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-15T15:05:57.227Z"}}]}}