PatchSiren cyber security CVE debrief
CVE-2026-12310 Mozilla CVE debrief
A memory safety bug was fixed in Firefox 152 and Firefox ESR 140.12. This vulnerability was published on [CVE.org](resourceLinkAnnotations:cve-org).
- 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 ensure they have the latest updates installed.
Technical summary
A memory safety bug was fixed in Firefox 152 and Firefox ESR 140.12.
Defensive priority
High
Recommended defensive actions
- Update to Firefox 152 or Firefox ESR 140.12
Evidence notes
The CVE record was obtained from [CVE.org](resourceLinkAnnotations:cve-org). Additional information can be found at [NVD](resourceLinkAnnotations:nvd), [Bugzilla](resourceLinkAnnotations:ref-4), [MFSA 2026-57](resourceLinkAnnotations:ref-5), and [MFSA 2026-58](resourceLinkAnnotations:ref-6).
Official resources
This CVE debrief was generated based on publicly available information. For more information, please see the CVE record and related resources.