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MEDIUM severity

CVE-2019-10794 — component-flatten

MEDIUM

CVE-2019-10794 is a medium-severity (CVSS 6.3) CWE-74 vulnerability in component-flatten. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

component-flatten vulnerable to Prototype Pollution

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs54th percentile — riskier than 54% of all scored CVEsHighest risk
0.00%0.41%0.82%1.23%0.3%0.7%Jun 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.

component-flattennpm
2Kdownloads / week

Description

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.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
📦npmcomponent-flattenall versionsNo fix

Affected Products

1 product · 1 configurations
Application
component-flattencomponent-flatten_project
all

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for component-flatten, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of component-flatten for CVE-2019-10794. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2019-10794: component-flatten (Medium 6.3)