Summary
Togoder Security scanned the npm package debug@4.3.7 on Oct 4, 2026. An AI review of 4 source files produced 3 low severity findings. No malicious behavior, install-time payloads, credential theft or exfiltration were identified.
Findings 3
LocalStorage access
NPS-BE6115959FBD
Reads/writes the 'debug' key in localStorage to persist namespace configuration. This is documented, expected behavior of the debug package.
Environment variable access
NPS-ADE64D393E5A
Reads process.env.DEBUG for Electron environments. This is standard debug configuration behavior, not credential harvesting.
Dynamic regular expression construction
NPS-BBFC6DC26FCA
The enable() function constructs RegExp objects from user-controlled namespace strings without escaping. This could theoretically lead to ReDoS if a malicious namespace is provided, but in the context of the debug package this is expected behavior and not a security vulnerability in itself.
Files reviewed
| File | Verdict | What the reviewer saw |
|---|---|---|
| src/browser.js | safe | This is the legitimate browser implementation of the well-known 'debug' npm package; no malicious patterns, exfiltration, dynamic execution, or suspicious network/process activity were detected. |
| src/common.js | safe | This is the legitimate source code for the popular 'debug' npm package; no malicious patterns such as data exfiltration, credential harvesting, obfuscation, or backdoors were detected. |
| src/index.js | safe | No malicious patterns detected |
| src/node.js | safe | No malicious patterns detected |
Affected version ranges
None of the 5 scanned versions of debug are flagged high or critical. The latest scanned version, 4.4.3, is clean. Only versions we have scanned are listed; unscanned versions between them are not covered.
| Versions | Verdict | Count | Range | Top findings |
|---|---|---|---|---|
| 4.4.3 | No issues | 1 | 4.4.3 | |
| 4.4.1 | Not scanned | 1 | 4.4.1 | |
| 4.3.7 | No issues | 1 | 4.3.7 | |
| 4.3.5 | Not scanned | 1 | 4.3.5 | |
| 3.2.7 – 4.3.4 | No issues | 2 | >=3.2.7 <=4.3.4 | |
| 2.6.9 | Needs review | 1 | 2.6.9 |
Full list, including published versions not scanned yet: version ranges API.
Scanned versions of debug
Frequently asked questions
Is debug safe to use?
Our AI source review of debug@4.3.7 found no malicious code: no install-time payloads, credential theft, exfiltration, obfuscated loaders or backdoors.
Does debug contain malware?
No malware was identified in debug@4.3.7 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 debug checked?
Togoder Security downloaded the published npm package and had an AI model read its 4 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 debug 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 debug@4.3.7, cost nothing.