Description
Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Affected products
mozilla: firefox; mozilla: thunderbird
References10
- www.mozilla.org/security/advisories/mfsa2026-30/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-32/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-33/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-34/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=2021769 Permissions Required
- access.redhat.com/errata/RHSA-2026:10757
- access.redhat.com/errata/RHSA-2026:10766
- access.redhat.com/errata/RHSA-2026:10767
- access.redhat.com/errata/RHSA-2026:12285
- access.redhat.com/errata/RHSA-2026:13537
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 35 · as of 13 November 2026
- CWE
- CWE-416CWE-825
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