{"schema":"threatline.record/2","record":{"id":"CVE-2026-112942","aliases":["GHSA-587h-7wmj-h5pm"],"summary":"launch-editor: `fs.existsSync()` existence check can be bypassed on Windows","details":"### Summary\n\n`launch-editor` checked `fs.existsSync(fileName)` before passing a supplied path to an editor command. On Windows, an attacker can bypass this check with a crafted path ending in `\\\\..:line:column`. This removes the requirement that the attacker be able to place a file with a malicious filename.\n\nCombined with the `%` escaping issue described in [GHSA-698v-4r3x-3vcv](https://github.com/vitejs/launch-editor/security/advisories/GHSA-698v-4r3x-3vcv), this bypass can lead to OS command injection when an attacker controls the file argument.\n\n### Impact\n\nOnly apps that runs on Windows is affected.\n\n### Details\n\nThe earlier advisory assumed that `fs.existsSync()` required an attacker-controlled filename to exist. This advisory covers a bypass of that requirement.\n\nA crafted value ending in `\\\\..:1:1` is interpreted differently by `launch-editor-middleware`, `launch-editor`, and Windows:\n\n1. `launch-editor-middleware` calls `path.resolve()` while the final path component is `..:1:1`, so it is not treated as a parent-directory component.\n2. `launch-editor` treats `:1:1` as a line-and-column suffix and removes it, leaving a path ending in `\\\\..`.\n3. On Windows, `fs.existsSync()` accepts the resulting path as the existing parent directory even though the attacker-controlled preceding component does not exist.\n4. Because the existence check passes, the crafted filename reaches the Windows shell command.","categories":["Libraries & packages"],"product":"launch-editor","vendor":"vitejs","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-587h-7wmj-h5pm","source_modified_at":"2026-10-20T19:48:26Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"launch-editor"},"range":"<= 2.14.1"},{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-587h-7wmj-h5pm","source_modified_at":"2026-10-20T19:48:26Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"vite"},"range":">= 8.3.0, <= 8.3.2"},{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-587h-7wmj-h5pm","source_modified_at":"2026-10-20T19:48:26Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"vite"},"range":">= 8.2.0, <= 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