Description
Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Affected products
mozilla: firefox; mozilla: thunderbird
References10
- www.mozilla.org/security/advisories/mfsa2026-46/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-47/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-48/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-50/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-51/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=2038439 Permissions Required
- access.redhat.com/errata/RHSA-2026:21378
- access.redhat.com/errata/RHSA-2026:21380
- access.redhat.com/errata/RHSA-2026:21381
- access.redhat.com/errata/RHSA-2026:21382
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: 36 · as of 14 November 2026
- CWE
- CWE-416CWE-825
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