Integer overflow in Mozilla products - CVE-2026-5732

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in the Graphics: Text component. A remote attacker can trick the victim into visiting a specially crafted website, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

How to mitigate CVE-2026-5732

Sources

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-27/
• https://www.mozilla.org/en-US/security/advisories/mfsa2026-25/
• https://bugzilla.mozilla.org/show_bug.cgi?id=2017867