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fix(files): cap per-entry decompressed size during zip extraction #321

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fix(files): cap per-entry decompressed size during zip extraction #321

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6 changes: 5 additions & 1 deletion backend/files/file-archive.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -228,8 +228,12 @@ async function extractWithinLimit(
failure = new Error(`Extracted content exceeds maximum allowed size of ${limitMB}MB`);
return;
}
chunks.push(chunk);
fileBytes += chunk.length;
if (fileBytes > limit) {
failure = new Error(`Entry "${file.name}" exceeds maximum allowed size of ${limitMB}MB`);
return;
}
chunks.push(chunk);
if (final) {
writes.push(writeEntry(fullPath, concatChunks(chunks, fileBytes)));
entryCount++;
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