CVE-2026-5732
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- mozilla firefox140.9.1, 149.0.2 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:13977
- access.redhat.com/errata/RHSA-2026:13665
- access.redhat.com/errata/RHSA-2026:11813
- access.redhat.com/errata/RHSA-2026:7672
- access.redhat.com/errata/RHSA-2026:9638
- access.redhat.com/errata/RHSA-2026:8052
- access.redhat.com/errata/RHSA-2026:9345
- access.redhat.com/errata/RHSA-2026:11805
- access.redhat.com/errata/RHSA-2026:13600
- access.redhat.com/errata/RHSA-2026:14303
- access.redhat.com/errata/RHSA-2026:13683
- access.redhat.com/errata/RHSA-2026:15889
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 140.9.1, v < 149.0.2 | 140.9.1, 149.0.2 |
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