CVE-2026-100765: 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 and Firefox 157.
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 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
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-2026-100760
- CVE-2026-100761
- CVE-2026-100762
- CVE-2026-100763
- CVE-2026-100764
- CVE-2026-100765
- CVE-2026-100766
- CVE-2026-100767
- CVE-2026-100768
- 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-2026-100787
- CVE-2026-100788
- CVE-2026-100789
- CVE-2026-100790
- CVE-2026-100791
- CVE-2026-100792
- CVE-2026-100793
- CVE-2026-100794
- CVE-2026-96869
- CVE-2026-100795
- CVE-2026-100796
- CVE-2026-100797
- CVE-2026-100798
- CVE-2026-100799
- CVE-2026-100800
- CVE-2026-100801
- CVE-2026-100802
- CVE-2026-100803
- CVE-2026-100804
- CVE-2026-100805
- CVE-2026-100806
- CVE-2026-100807
- CVE-2026-100808
- CVE-2026-100809
- CVE-2026-100810
- CVE-2026-100811
- CVE-2026-100812
- CVE-2026-100813
- CVE-2026-100814
- CVE-2026-100815
- CVE-2026-100816
- CVE-2026-100817
- CVE-2026-100818
- CVE-2026-100819
- CVE-2026-100820
- CVE-2026-100821
- 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-2026-100832
- CVE-2026-103500
Frequently Asked Questions
Which Mozilla products should be reviewed for this issue?
The affected software list includes Mozilla Firefox and Mozilla Firefox ESR.
Where is vendor guidance available?
Mozilla has published advisories MFSA 2026-97 and MFSA 2026-100. The issue is also tracked in Mozilla Bugzilla as bug 2061399.