CVE-2026-4728
MEDIUMCVSS 6.5/10EPSS 0.24%
Last modified
CVE-2026-4728 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 149.0 |
| Mozilla | Thunderbird | < 149.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2013179Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-20/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-23/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-4728?
Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
How severe is CVE-2026-4728?
CVE-2026-4728 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.
How do I fix CVE-2026-4728?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-47273pam_usb provides hardware authentication for Linux using ord…6.5
- CVE-2026-47274pam_usb provides hardware authentication for Linux using ord…6.3
- CVE-2026-47275In nanomq versions 0.24.11 and earlier, a NULL pointer deref…2.6
- CVE-2026-47276In nanomq versions 0.24.11 and earlier, a NULL pointer deref…6.5
- CVE-2026-47277Runtipi is a personal homeserver orchestrator. In versions 4…6.5
- CVE-2026-47279NocoDB is software for building databases as spreadsheets. P…6.9
- CVE-2026-47280Improper authentication in Azure Resource Manager (ARM) allo…9.8
- CVE-2026-47281Missing authorization in Visual Studio Code allows an unauth…9.6
- CVE-2026-47282Insufficiently protected credentials in GitHub Copilot and V…6.5
- CVE-2026-47284Exposure of sensitive information to an unauthorized actor i…6.5
- CVE-2026-47285Improper neutralization of special elements used in a comman…6.5
- CVE-2026-47287Relative path traversal in Visual Studio Code allows an unau…6.5
Are you affected by CVE-2026-4728?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST