Mozilla Product Security Update Advisory

Overview

 

We have released security updates to fix vulnerabilities in Mozilla products. Users of affected products are advised to update to the latest version.
 

 

Affected Products

 

CVE-2025-49709, CVE-2025-49710

 

Firefox Versions: 139.0.4 and earlier

 

 

Resolved Vulnerabilities

 

Memory corruption vulnerability in Firefox (CVE-2025-49709)
Integer overflow vulnerability in the handling of HashTables used by the JavaScript engine in Firefox (CVE-2025-49710)

 

 

Vulnerability Patches

Vulnerability patches have been made available in the latest updates. Please follow the instructions on the Referenced Sites to update to the latest Vulnerability Patches version.

 

 

CVE-2025-49709, CVE-2025-49710

 

Firefox version: 139.0.4

 

 

References

 

[1] Mozilla Foundation Security Advisory 2025-47
https://www.mozilla.org/en-US/security/advisories/mfsa2025-47/