PT-2026-30823 · Mozilla · Firefox+1

Sajeeb Lohani · Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-5732

Mitre

CVSS v3.1

8.8

High

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability affects Firefox < 149.0.2 and Firefox ESR < 140.9.1.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-5732

Affected Products

Firefox

Firefox Esr

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-5732 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-25 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-27 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2017867 · Note