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CVE-2025-6432 — When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain…

Mozilla · Firefox · Published 24 Jun 2025 · Modified 30 Sept 2026

Description

When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

References

What to do
  1. Check whether Firefox is in your asset inventory.
  2. Patch in the next maintenance window; prioritise internet-facing systems.
  3. Record the decision in your risk register for audit evidence.
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Link: adminadda.com/cve/CVE-2025-6432