1vulnerability
- Critical0 (0.0%)
- High0 (0.0%)
- Medium0 (0.0%)
- Moderate0 (0.0%)
- Low1 (100.0%)
deepmerge
Ecosystem: npm
Downloads:
- 0CriticalAffects 0 versions
- 0HighAffects 0 versions
- 0MediumAffects 0 versions
- 0ModerateAffects 0 versions
- 1LowAffects 1 version
Monthly breakdown
- 1 vulnerabilities
- Critical: 0
- High: 0
- Medium: 0
- Moderate: 0
- Low: 1
Vulnerabilities (1)
Known vulnerabilities affecting deepmerge, based on data from OSV.
| ID | Severity | Summary | Affected versions | Published | Source |
|---|---|---|---|---|---|
| GHSA-gcqx-w48m-w2h4 | Low | deepmerge mergeObject() allows prototype poisoning of returned objectsdeepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks. |
| GitHub (opens in a new tab) |
- GHSA-gcqx-w48m-w2h4Lowdeepmerge mergeObject() allows prototype poisoning of returned objects
>= 4.2.0, <= 4.3.1
deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.
CVE: CVE-2026-93753