CVE-2026-8969
published 2026-05-19CVE-2026-8969: Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
PriorityP344high8.1CVSS 3.1
AVNACLPRNUIRSUCHIHAN
EPSS
0.29%
21.1th percentile
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 151 | Firefox 151 |
| mozilla | firefox | < 151.0.0 | 151.0.0 |
| mozilla | thunderbird | < Thunderbird 151 | Thunderbird 151 |
| mozilla | thunderbird | < 151.0.0 | 151.0.0 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
vendor_redhat8.1HIGH
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Red Hat
firefox: thunderbird: Mitigation bypass in the DOM: Security component
vendor_redhat·2026-05-19·CVSS 8.1
CVE-2026-8969 [HIGH] CWE-1021 firefox: thunderbird: Mitigation bypass in the DOM: Security component
firefox: thunderbird: Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Mitigation bypass in the DOM: Security component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 10) - Not affected
Package: firefox (Red Hat
Mozilla
Mozilla Foundation Security Advisory 2026-46: CVE-2026-8969
vendor_mozilla·CVSS 8.1
CVE-2026-8969 [HIGH] Mozilla Foundation Security Advisory 2026-46: CVE-2026-8969
Mozilla Foundation Security Advisory 2026-46
CVE: CVE-2026-8969
Product: Firefox
Impact: high
Fixed in: Firefox 151
Mozilla
Mozilla Foundation Security Advisory 2026-50: CVE-2026-8969
vendor_mozilla·CVSS 8.1
CVE-2026-8969 [HIGH] Mozilla Foundation Security Advisory 2026-50: CVE-2026-8969
Mozilla Foundation Security Advisory 2026-50
CVE: CVE-2026-8969
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 151
VulDB
Mozilla Firefox up to 150 Security access control (EUVD-2026-30921)
vuldb·2026-05-19·CVSS 8.1
CVE-2026-8969 [HIGH] Mozilla Firefox up to 150 Security access control (EUVD-2026-30921)
A vulnerability was found in Mozilla Firefox up to 150 and classified as critical. Affected by this issue is some unknown functionality of the component Security Component. The manipulation results in improper access controls.
This vulnerability is reported as CVE-2026-8969. The attack can be launched remotely. No exploit exists.
It is suggested to upgrade the affected component.
GHSA
GHSA-2944-xfpq-698x: Mitigation bypass in the DOM: Security component
ghsa_unreviewed·2026-05-19
CVE-2026-8969 [HIGH] CWE-693 GHSA-2944-xfpq-698x: Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151.
No detection rules found.
No public exploits indexed.
2026-05-19
Published