CVE-2026-0882
High
Description
Use-after-free in the IPC component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- mozilla firefox115.32.0, 147.0, 140.7.0 or later
- mozilla thunderbird140.7.0, 147.0 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:2231
- access.redhat.com/errata/RHSA-2026:2271
- access.redhat.com/errata/RHSA-2026:2286
- access.redhat.com/errata/RHSA-2026:0667
- access.redhat.com/errata/RHSA-2026:2220
- access.redhat.com/errata/RHSA-2026:2074
- access.redhat.com/errata/RHSA-2026:1471
- access.redhat.com/errata/RHSA-2026:2073
- access.redhat.com/errata/RHSA-2026:1461
- access.redhat.com/errata/RHSA-2026:2070
- access.redhat.com/errata/RHSA-2026:1487
- access.redhat.com/errata/RHSA-2026:2069
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.32.0, v < 147.0, 128.0 ≤ v < 140.7.0 | 115.32.0, 147.0, 140.7.0 |
| mozilla thunderbird | v < 140.7.0, v < 147.0 | 140.7.0, 147.0 |
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