{"id":"CVE-2026-54525","summary":"Markdown Preview Enhanced: One Click RCE via Markdown Link Command Injection on Windows","details":"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.","aliases":["GHSA-7v6f-3vq6-r373"],"modified":"2026-10-15T10:47:31.707002169Z","published":"2026-10-14T19:06:59.440Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54525.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-78"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54525.json"},{"type":"FIX","url":"https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee"},{"type":"FIX","url":"https://github.com/shd101wyy/crossnote/pull/442"},{"type":"WEB","url":"https://github.com/shd101wyy/crossnote/releases/tag/0.9.29"},{"type":"FIX","url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77"},{"type":"FIX","url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/pull/2318"},{"type":"WEB","url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28"},{"type":"ADVISORY","url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/security/advisories/GHSA-7v6f-3vq6-r373"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54525"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced","events":[{"introduced":"0"},{"fixed":"dcd80281c986293b93d9f1af34ced64dcb230c77"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.8.28"}],"source":"AFFECTED_FIELD"}}],"versions":["0.8.27","0.8.26","0.8.25","0.8.24","0.8.23","0.8.21","0.8.20","0.8.19","0.8.18","0.8.17","0.8.16","0.8.15","0.8.14","0.8.13","0.8.12","0.8.11","0.8.10","0.8.9","0.8.8","0.8.7","0.8.6","0.8.5","0.8.4","0.8.3","0.8.2","0.8.1","0.8.0","0.7.10","0.7.9","0.7.8","0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.10","v0.6.8","v0.6.7","v0.6.6","v0.6.5","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.22","v0.5.21","v0.5.20","v0.5.18","v0.5.17","v0.5.16","v0.5.15","v0.5.14","v0.5.13","v0.5.12","v0.5.11","v0.5.10","v0.5.9","v0.5.8","v0.5.4","v0.5.3","v0.5.2","v0.5.1","0.5.1","0.5.0","v0.4.3","0.4.3","v0.4.2","0.4.2","v0.4.1","0.4.1","0.4.0","v0.3.13","0.3.13","v0.3.12","0.3.12","0.3.11","0.3.10","0.3.9","0.3.8","0.3.7","0.3.6","0.3.5","0.3.4","0.3.3","0.3.2","0.3.1","0.3.0","0.2.9","0.2.8","0.2.7","0.2.6","0.2.5","0.2.4","0.2.3","0.2.2","0.2.1","0.2.0","0.1.9","0.1.8","0.1.7","0.1.6","0.1.5","0.1.4","0.1.3","0.1.2","0.1.1","0.1.0","0.0.9","0.0.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54525.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}