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fix: SEC-4653 prevent ReDoS vulnerability in HTML payload unwrapping regex #686

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Merged
merged 3 commits into from
Jul 28, 2025
Merged

fix: SEC-4653 prevent ReDoS vulnerability in HTML payload unwrapping regex #686

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c939dca
fix: prevent ReDoS vulnerability in HTML payload unwrapping regex
jentfoo Jul 16, 2025
6f28cbd
Update lib/tdf3/src/utils/unwrap.ts
jentfoo Jul 18, 2025
c1f7f08
regex DoS improvements and testing
jentfoo Jul 18, 2025
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2 changes: 1 addition & 1 deletion lib/tdf3/src/utils/unwrap.ts
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Expand Up @@ -3,8 +3,8 @@

export function unwrapHtml(htmlPayload: Uint8Array): Uint8Array {
const html = new TextDecoder().decode(htmlPayload);
const payloadRe = /<input id=['"]?data-input['"]?[^>]*?value=['"]?([a-zA-Z0-9+/=]+)['"]?/;
const payloadRe = /<input id=['"]?data-input['"]?[^>]*?value=['"]?([a-zA-Z0-9+/=]+?)['"]?/;
const reResult = payloadRe.exec(html);
if (!reResult) {
throw new InvalidFileError('Payload is missing');
}
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