CVE-2026-100772: Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
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 140.17 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 157 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.4 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 153.4 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 157 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 140.17
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-100756
- CVE-2026-100757
- CVE-2026-100758
- CVE-2026-100759
- CVE-2026-100762
- CVE-2026-92035
- CVE-2026-100766
- CVE-2026-100767
- CVE-2026-100769
- CVE-2026-100770
- CVE-2026-100771
- CVE-2026-100772
- CVE-2026-100773
- CVE-2026-100774
- CVE-2026-100775
- CVE-2026-100776
- CVE-2026-100777
- CVE-2026-100778
- CVE-2026-100779
- CVE-2026-100780
- CVE-2026-100781
- CVE-2026-100782
- CVE-2026-100783
- CVE-2026-100784
- CVE-2026-100785
- CVE-2026-100786
- CVE-2026-100788
- CVE-2026-100789
- CVE-2026-100790
- CVE-2026-100791
- CVE-2026-100832
- CVE-2026-100792
- CVE-2026-100794
- CVE-2026-96869
- CVE-2026-100797
- CVE-2026-100801
- CVE-2026-100803
- CVE-2026-100807
- CVE-2026-100811
- CVE-2026-100818
- CVE-2026-100819
- CVE-2026-100820
- CVE-2026-100821
- CVE-2026-100760
- CVE-2026-100761
- CVE-2026-100763
- CVE-2026-100764
- CVE-2026-100765
- CVE-2026-100768
- CVE-2026-100787
- CVE-2026-100793
- CVE-2026-100795
- CVE-2026-100796
- CVE-2026-100798
- CVE-2026-100799
- CVE-2026-100800
- CVE-2026-100802
- CVE-2026-100804
- CVE-2026-100805
- CVE-2026-100806
- CVE-2026-100808
- CVE-2026-100809
- CVE-2026-100810
- CVE-2026-100812
- CVE-2026-100813
- CVE-2026-100814
- CVE-2026-100815
- CVE-2026-100816
- CVE-2026-100817
- CVE-2026-100822
- CVE-2026-100823
- CVE-2026-100824
- CVE-2026-100825
- CVE-2026-100826
- CVE-2026-100828
- CVE-2026-100829
- CVE-2026-100830
- CVE-2026-100831
- CVE-2026-103500
Frequently Asked Questions
Which Mozilla products should be assessed for this issue?
The affected software listed for this CVE is Mozilla Firefox and Mozilla Firefox ESR.
Where can responders find the vendor’s advisory information?
Mozilla references this issue in MFSA 2026-99 and MFSA 2026-97, with additional tracking information in Bugzilla issue 2068340.