CVE-2026-5732

Published: Apr 7, 2026Modified: Jun 17, 2026

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

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

Affected (2)

Products: Mozilla: Firefox

Mozilla

1 product

Firefox

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 149.0.2
Mozilla Firefox	Before 140.9.1

Related CWEs

CWE-190

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (5)

https://bugzilla.mozilla.org/show_bug.cgi?id=2017867

Source: security@mozilla.org

Issue TrackingPermissions Required

https://www.mozilla.org/security/advisories/mfsa2026-25/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2026-27/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2026-28/

Source: security@mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-29/

Source: security@mozilla.org

Timeline

No history available yet.