CVE-2026-12326
Memory safety bugs fixed in Firefox 152 and Thunderbird 152
- State
- Published
- Severity
- 8.1 High
- Published
- Jun 16, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jun 15, 2026
Description
Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
FirefoxMozilla |
|
ThunderbirdMozilla |
|
References
- Moderate Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152
- Low Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152
- High Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152
- https://www.mozilla.org/security/advisories/mfsa2026-57/
- https://www.mozilla.org/security/advisories/mfsa2026-60/
- https://access.redhat.com/security/cve/CVE-2026-12326vdb-entry
- RHBZ#2489222issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12326.json
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