CVE-2026-100769: Use-after-free in the JavaScript: WebAssembly component
Use-after-free in the JavaScript: WebAssembly 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
Frequently Asked Questions
Which Firefox releases contain the fix?
The vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Which products should be checked during triage?
Check Mozilla Firefox and Mozilla Firefox ESR deployments. Compare deployed versions with the listed fixed releases to determine whether they include the fix.