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🛡️ Sentinel: [HIGH] Fix path traversal vulnerability in audio upload #30

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Merged
adihex merged 2 commits into from
Sep 5, 2026
Merged

🛡️ Sentinel: [HIGH] Fix path traversal vulnerability in audio upload #30

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0cda72a
fix(zettel): prevent path traversal in audio upload
google-labs-jules[bot] Sep 4, 2026
ec7c61b
Merge main and reconcile overlapping upload sanitization
adihex Sep 5, 2026
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6 changes: 4 additions & 2 deletions apps/zettel/src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -265,10 +265,12 @@ const routes = api
const arrayBuffer = await file.arrayBuffer();
const data = Buffer.from(arrayBuffer);

const safeFileName = file.name.replace(/[^a-zA-Z0-9.-]/g, "_");
// Sanitize the filename to prevent Windows-style path traversal attacks
// path.basename does not strip backslashes on POSIX systems
const safeFilename = path.basename(file.name).replace(/[^a-zA-Z0-9.-]/g, '_');
const tmpPath = path.join(
os.tmpdir(),
`zettel-audio-${Date.now()}-${safeFileName}`,
`zettel-audio-${Date.now()}-${safeFilename}`,
);
fs.writeFileSync(tmpPath, data);

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