Summary
Togoder Security scanned the npm package react-is@16.13.1 on Oct 6, 2026. An AI review of 3 source files produced no findings. No malicious behavior, install-time payloads, credential theft or exfiltration were identified.
Findings
No findings. The reviewer saw nothing malicious or risky in this version.
Files reviewed
| File | Verdict | What the reviewer saw |
|---|---|---|
| cjs/react-is.development.js | safe | No malicious patterns detected |
| index.js | safe | No malicious patterns detected |
| umd/react-is.development.js | safe | This is the legitimate React v16.13.1 react-is package containing only type-checking utilities and no malicious patterns. |
Affected version ranges
None of the 3 scanned versions of react-is are flagged high or critical. The latest scanned version, 19.3.0, is clean. Only versions we have scanned are listed; unscanned versions between them are not covered.
| Versions | Verdict | Count | Range | Top findings |
|---|---|---|---|---|
| 19.3.0 | No issues | 1 | 19.3.0 | |
| 18.3.1 – 19.2.8 | Not scanned | 5 | >=18.3.1 <=19.2.8 | |
| 16.13.1 – 17.0.2 | No issues | 2 | >=16.13.1 <=17.0.2 |
Full list, including published versions not scanned yet: version ranges API.
Scanned versions of react-is
Frequently asked questions
Is react-is safe to use?
Our AI source review of react-is@16.13.1 found no malicious code: no install-time payloads, credential theft, exfiltration, obfuscated loaders or backdoors.
Does react-is contain malware?
No malware was identified in react-is@16.13.1 when Togoder Security scanned it on Oct 6, 2026. A new version can still introduce malicious code, so scan the exact versions in your lockfile.
How was react-is checked?
Togoder Security downloaded the published npm package and had an AI model read its 3 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 react-is 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 react-is@16.13.1, cost nothing.