PatchSiren cyber security CVE debrief

CVE-2026-12329 Mozilla CVE debrief

A memory safety bug was fixed in Firefox ESR 140.12. This vulnerability was fixed in Firefox ESR 140.12. The bug was reported via [ref-4](resourceLinkAnnotations.ref-4) and [ref-5](resourceLinkAnnotations.ref-5).

Vendor: Mozilla
Product: Firefox
CVSS: MEDIUM 5.3
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-16
Original CVE updated: 2026-06-16
Advisory published: 2026-06-16
Advisory updated: 2026-06-16

Who should care

Users of Firefox ESR 140.12

Technical summary

Memory safety bug fixed in Firefox ESR 140.12

Defensive priority

Medium

Recommended defensive actions

Update to Firefox ESR 140.12 or later

Evidence notes

The CVE was published on 2026-06-16T13:16:33.657Z and last modified on 2026-06-16T13:16:33.657Z. The vendor is likely Mozilla, based on [evidence-0].

Official resources

CVE-2026-12329 CVE record
CVE.org
CVE-2026-12329 NVD detail
NVD
Source item URL
nvd_modified
Source reference
[email protected]
Source reference
[email protected]

The CVE was published on 2026-06-16T13:16:33.657Z and last modified on 2026-06-16T13:16:33.657Z.