CVE-2026-24868
📋 TL;DR
This CVE describes a mitigation bypass vulnerability in Firefox's Privacy: Anti-Tracking component that could allow attackers to circumvent privacy protections. It affects Firefox versions below 147.0.2, potentially exposing users to enhanced tracking despite anti-tracking features being enabled.
💻 Affected Systems
- Mozilla Firefox
📦 What is this software?
Firefox by Mozilla
⚠️ Risk & Real-World Impact
Worst Case
Attackers could bypass all privacy protections, enabling comprehensive user tracking, data collection, and potential correlation of browsing activities across sessions.
Likely Case
Targeted tracking of specific users or sessions, allowing advertisers or malicious actors to build more complete user profiles despite anti-tracking measures.
If Mitigated
Limited tracking capabilities with some privacy protections still functioning, though certain bypass methods may succeed.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website) but no authentication. Technical details suggest moderate complexity for reliable exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 147.0.2
Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2026-06/
Restart Required: Yes
Instructions:
1. Open Firefox. 2. Click menu → Help → About Firefox. 3. Firefox will automatically check for updates and prompt to install version 147.0.2. 4. Restart Firefox when prompted.
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript to prevent exploitation vectors
about:config → javascript.enabled = false
Use Private Browsing Mode
allPrivate browsing may limit tracking impact
Ctrl+Shift+P (Windows/Linux) or Cmd+Shift+P (macOS)
🧯 If You Can't Patch
- Use alternative browsers with updated privacy protections
- Implement network-level tracking protection via proxy or firewall
🔍 How to Verify
Check if Vulnerable:
Check Firefox version in Help → About Firefox. If version is less than 147.0.2, system is vulnerable.Check Version:
firefox --versionVerify Fix Applied:
Confirm Firefox version is 147.0.2 or higher in Help → About Firefox.📡 Detection & Monitoring
Log Indicators:
- Unusual tracking cookie persistence
- Multiple third-party domain requests from single sessions
Network Indicators:
- Increased third-party tracker connections
- Unusual cookie synchronization patterns
SIEM Query:
source="firefox.log" AND ("tracking" OR "privacy") AND version<"147.0.2"