PatchTheCVECVE-2019-10794: All versions of component-flatten are vulnerable to Prototype Pollution
CVE-2019-10794 is a medium-severity flaw (CVSS 6.3) affecting component-flatten. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
All versions of component-flatten are vulnerable to Prototype Pollution. The a function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 6.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 46%) |
| CISA exploited list | No |
| Weakness | CWE-74 |
| Published | 2020-02-18 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-10794?
component-flatten: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2019-10794 being exploited?
CVE-2019-10794 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-10794 affect?
CVE-2019-10794 affects component-flatten. Severity is medium (CVSS 6.3). All versions of component-flatten are vulnerable to Prototype Pollution. The a function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
How urgent is CVE-2019-10794?
Priority 36/100. No elevated risk signals yet.