CVE-2026-100785: 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, Firefox ESR 115.42, 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 115.42 - 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 115.42 - 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-2026-100770
- CVE-2026-100771
- CVE-2026-100773
- CVE-2026-100774
- CVE-2026-100775
- 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-2026-100789
- CVE-2026-100790
- CVE-2026-100791
- CVE-2026-100832
- CVE-2026-100797
- CVE-2026-100803
- CVE-2026-100819
- CVE-2026-100821
- CVE-2026-100769
- CVE-2026-100772
- CVE-2026-100776
- CVE-2026-100788
- CVE-2026-100792
- CVE-2026-100794
- CVE-2026-96869
- CVE-2026-100801
- CVE-2026-100807
- CVE-2026-100811
- CVE-2026-100818
- CVE-2026-100820
- 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
Frequently Asked Questions
Which Firefox releases contain the fix?
The issue was fixed in Firefox 157, Firefox ESR 153.4, Firefox ESR 115.42, and Firefox ESR 140.17.
How can I determine whether an installation is still affected?
Check the installed Firefox version and ESR release line. Installations below the listed fixed release for their respective Firefox or ESR line are not identified as fixed by the provided information.