CVE-2026-100825: Use-after-free in the JavaScript Engine: JIT component
Published Sep 29, 2026
·Updated
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
Affected Software
2 affected componentsFixes available
Mozilla Firefox<157
157
Mozilla Firefox ESR<153.4
153.4
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
Sep 29, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·12:36 PM
Data Sourced
via MITRE·12:36 PM
Description
Data Sourced
via NVD·01:17 PM
DescriptionSeverityWeakness
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
Frequently Asked Questions
1
Which Mozilla product lines are listed as affected?
The listed software is Mozilla Firefox and Mozilla Firefox ESR.
2
Which vendor advisories cover this issue?
Mozilla lists this issue in MFSA 2026-97 and MFSA 2026-100. A related Bugzilla record is 2057465.