Description
Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
Affected products
mozilla: firefox; mozilla: thunderbird
References10
- www.mozilla.org/security/advisories/mfsa2026-40/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-41/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-42/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-43/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-44/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=2034352 Permissions Required
- access.redhat.com/errata/RHSA-2026:19160
- access.redhat.com/errata/RHSA-2026:20566
- access.redhat.com/errata/RHSA-2026:20574
- access.redhat.com/errata/RHSA-2026:21381
Metrics
- CVSS 3.1
-
7.3
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EPSS — exploit probability
- 0% percentile: 25 · as of 13 November 2026
- CWE
- CWE-416CWE-825
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