PatchSiren cyber security CVE debrief
CVE-2026-12326 Mozilla CVE debrief
A series of memory safety bugs were discovered in Firefox 151 and Thunderbird 151. Some of these bugs demonstrated evidence of memory corruption. While the exact impact of these vulnerabilities is unclear, it is presumed that, with sufficient effort, an attacker could potentially exploit them to execute arbitrary code.
- Vendor
- Mozilla
- Product
- Firefox
- CVSS
- HIGH 8.1
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-16
- Original CVE updated
- 2026-06-17
- Advisory published
- 2026-06-16
- Advisory updated
- 2026-06-17
Who should care
Users of Firefox 151 and Thunderbird 151 are potentially affected by these vulnerabilities.
Technical summary
The CVE-2026-12326 entry details multiple memory safety bugs found in Firefox 151 and Thunderbird 151. These bugs could potentially be exploited to run arbitrary code, although the exact impact is not specified.
Defensive priority
High
Recommended defensive actions
- Users should update to Firefox 152, which addresses these vulnerabilities.
Evidence notes
The CVE and associated sources indicate that these vulnerabilities were addressed in Firefox 152.
Official resources
CVE-2026-12326 was published on 2026-06-16T13:16:33.380Z.