PatchSiren cyber security CVE debrief
CVE-2026-12314 Mozilla CVE debrief
A memory safety bug was fixed in Firefox 152 and Firefox ESR 140.12. This vulnerability was published on June 16, 2026.
- Vendor
- Mozilla
- Product
- Firefox
- CVSS
- HIGH 7.5
- 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 152 and Firefox ESR 140.12 should apply the updates to ensure their browsers are secure.
Technical summary
A memory safety bug was fixed in Firefox 152 and Firefox ESR 140.12.
Defensive priority
High
Recommended defensive actions
- Apply the updates to Firefox 152 and Firefox ESR 140.12 to ensure the memory safety bug is fixed.
Evidence notes
The CVE record was obtained from the official CVE.org website.
Official resources
Mozilla has addressed a memory safety bug in Firefox 152 and Firefox ESR 140.12. Users should update their browsers to ensure they are protected against potential exploits.