1vulnerability
- Critical0 (0.0%)
- High1 (100.0%)
- Medium0 (0.0%)
- Moderate0 (0.0%)
- Low0 (0.0%)
flat-to-nested
Ecosystem: npm
Downloads:
- 0CriticalAffects 0 versions
- 1HighAffects 1 version
- 0MediumAffects 0 versions
- 0ModerateAffects 0 versions
- 0LowAffects 0 versions
Monthly breakdown
- 1 vulnerabilities
- Critical: 0
- High: 1
- Medium: 0
- Moderate: 0
- Low: 0
Vulnerabilities (1)
Known vulnerabilities affecting flat-to-nested, based on data from OSV.
| ID | Severity | Summary | Affected versions | Published | Source |
|---|---|---|---|---|---|
| GHSA-hp36-v28f-w3r4 | High | flat-to-nested: Prototype pollution in flat-to-nested convert() via __proto__ parent/id key### Summary `convert()` builds the nested tree by using each flat record's `id` and `parent` field values directly as object keys, with no guard against `__proto__` / `constructor` / `prototype`. A record whose `parent` is the string `"__proto__"` makes `temp[parent]` resolve to `Object.prototype`, and the following `initPush(...)` writes attacker-controlled data onto the global prototype. Any application that passes attacker-influenced records to `convert()` is affected, and the base prototype methods stay intact so the pollution is stealthy. ### Details In `index.js`, `convert()` (`Fl |
| GitHub (opens in a new tab) |
- GHSA-hp36-v28f-w3r4Highflat-to-nested: Prototype pollution in flat-to-nested convert() via __proto__ parent/id key
< 1.1.2
### Summary `convert()` builds the nested tree by using each flat record's `id` and `parent` field values directly as object keys, with no guard against `__proto__` / `constructor` / `prototype`. A record whose `parent` is the string `"__proto__"` makes `temp[parent]` resolve to `Object.prototype`, and the following `initPush(...)` writes attacker-controlled data onto the global prototype. Any application that passes attacker-influenced records to `convert()` is affected, and the base prototype methods stay intact so the pollution is stealthy. ### Details In `index.js`, `convert()` (`Fl
CVE: CVE-2026-55091