CVE-2026-109734: Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 158 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.5 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 158 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 153.5
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-109704
- CVE-2026-109705
- CVE-2026-109706
- CVE-2026-109707
- CVE-2026-109708
- CVE-2026-109709
- CVE-2026-109710
- CVE-2026-109711
- CVE-2026-109712
- CVE-2026-109713
- CVE-2026-109714
- CVE-2026-109715
- CVE-2026-109716
- CVE-2026-109717
- CVE-2026-109718
- CVE-2026-109719
- CVE-2026-109720
- CVE-2026-109721
- CVE-2026-109722
- CVE-2026-109723
- CVE-2026-109724
- CVE-2026-109725
- CVE-2026-109726
- CVE-2026-109727
- CVE-2026-109728
- CVE-2026-109729
- CVE-2026-109730
- CVE-2026-109731
- CVE-2026-109732
- CVE-2026-109733
- CVE-2026-109734
- CVE-2026-109735
- CVE-2026-109736
- CVE-2026-109737
- CVE-2026-109738
- CVE-2026-109739
- CVE-2026-109740
- CVE-2026-109741
- CVE-2026-109742
- CVE-2026-109743
- CVE-2026-109744
- CVE-2026-109745
- CVE-2026-109746
- CVE-2026-109747
- CVE-2026-109748
- CVE-2026-109749
- CVE-2026-109750
- CVE-2026-109751
- CVE-2026-109752
- CVE-2026-109753
- CVE-2026-109754
- CVE-2026-109755
- CVE-2026-109756
- CVE-2026-109757
- CVE-2026-109759
- CVE-2026-109760
- CVE-2026-109761
- CVE-2026-109762
- CVE-2026-109763
- CVE-2026-109764
- CVE-2026-109765
- CVE-2026-109766
- CVE-2026-109767
- CVE-2026-109768
- CVE-2026-109769
- CVE-2026-109770
- CVE-2026-109771
- CVE-2026-109772
- CVE-2026-109773
- CVE-2026-109774
- CVE-2026-109775
- CVE-2026-109776
- CVE-2026-109777
- CVE-2026-109778
- CVE-2026-109779
- CVE-2026-109780
- CVE-2026-109781
- CVE-2026-109782
- CVE-2026-109783
Frequently Asked Questions
Which Firefox releases contain the fix?
The issue was fixed in Firefox 158 and Firefox ESR 153.5.
What can be determined about exposure or exploit prerequisites?
The available information identifies this as a mitigation bypass in the DOM Security component, but does not specify attacker prerequisites, affected configurations, or indicators of compromise.