Security Alert (A26-10-60): Multiple Vulnerabilities in FireFox

Description:

Mozilla has published the advisories (MFSA2026-118, MFSA2026-119 and MFSA2026-120) to address multiple vulnerabilities in Firefox. A remote attacker could entice a user to open a web page with specially crafted content on a vulnerable browser to exploit the vulnerabilities.

Affected Systems:

• Firefox ESR Windows versions prior to version 115.44, 153.6
• Firefox Windows versions prior to version 159

Impact:

Successful exploitation of the vulnerabilities could lead to denial of service, elevation of privilege, information disclosure, security restriction bypass or spoofing on an affected system.

Recommendation:

Mozilla has released new versions of the product to address the issues and they can be downloaded at the following URLs:
Firefox 159 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
Firefox ESR 115.44, 153.6 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-esr

Users of affected systems should follow the recommendations provided by the vendor and take immediate actions to mitigate the risk.

More Information:

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-118/
• https://www.mozilla.org/en-US/security/advisories/mfsa2026-119/
• https://www.mozilla.org/en-US/security/advisories/mfsa2026-120/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-100801
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-109705
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-109707 (to CVE-2026-109708)
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-117860 (to CVE-2026-118000)
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-118002 (to CVE-2026-118027)