Summary
Togoder Security scanned the npm package ufo@1.6.4 on Oct 4, 2026. An AI review of 2 source files produced 3 low severity findings. No malicious behavior, install-time payloads, credential theft or exfiltration were identified.
Findings 3
URL Parsing and Normalization Logic
NPS-1FE510D7A29A
The code implements URL parsing, encoding/decoding, and query string manipulation, including IDN (Punycode) conversion. This is legitimate functionality for a URL utility library (ufo).
Prototype Pollution Mitigation
NPS-AB1CF5DE9A46
The parseQuery function explicitly filters out keys like '__proto__' and 'constructor' to prevent prototype pollution, which is a security best practice.
No Suspicious Network or File System Activity
NPS-CA9043096C6B
No network requests, file system operations, child process spawning, environment variable harvesting, or dynamic code execution were found. The code is a self-contained URL utility library.
Files reviewed
| File | Verdict | What the reviewer saw |
|---|---|---|
| dist/index.cjs | safe | The code is a legitimate URL manipulation library with no malicious patterns; it includes prototype pollution protection and no external I/O or code execution. |
| dist/index.mjs | safe | No malicious patterns detected; this is the legitimate 'ufo' URL parsing library implementing punycode, URL/query encoding, and URL manipulation with no data exfiltration, code execution, process spawning, or credential harvesting. |
Affected version ranges
None of the 2 scanned versions of ufo are flagged high or critical. The latest scanned version, 1.6.4, is clean. Only versions we have scanned are listed; unscanned versions between them are not covered.
| Versions | Verdict | Count | Range | Top findings |
|---|---|---|---|---|
| 1.6.4 | No issues | 1 | 1.6.4 | |
| 1.6.3 | Not scanned | 1 | 1.6.3 | |
| 1.6.1 | No issues | 1 | 1.6.1 |
Full list, including published versions not scanned yet: version ranges API.
Scanned versions of ufo
Frequently asked questions
Is ufo safe to use?
Our AI source review of ufo@1.6.4 found no malicious code: no install-time payloads, credential theft, exfiltration, obfuscated loaders or backdoors.
Does ufo contain malware?
No malware was identified in ufo@1.6.4 when Togoder Security scanned it on Oct 4, 2026. A new version can still introduce malicious code, so scan the exact versions in your lockfile.
How was ufo checked?
Togoder Security downloaded the published npm package and had an AI model read its 2 source files, looking for install scripts, credential access, network exfiltration, obfuscation, backdoors and crypto-wallet theft. The results are cached by file hash and shown here.
How do I scan ufo together with the rest of my dependencies?
Upload your lockfile at https://security.togoder.click/scan or call the API documented at https://security.togoder.click/api-docs. Files that have already been scanned, like the ones in ufo@1.6.4, cost nothing.