SB2026012781 - Multiple vulnerabilities in Mozilla Firefox

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2026-24868)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application within the Privacy: Anti-Tracking component. A remote attacker can gain unauthorized access to sensitive information.

2) Use-after-free (CVE-ID: CVE-2026-24869)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the Layout: Scrolling and Overflow component. A remote attacker can trick the victim into visiting a specially crafted website and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

Install update from vendor's website.

References

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-06/
• https://bugzilla.mozilla.org/show_bug.cgi?id=2007302
• https://bugzilla.mozilla.org/show_bug.cgi?id=2008698