cbcvebase.
CVE-2026-100817
published 2026-09-29

CVE-2026-100817: Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

PriorityP425medium5.4CVSS 3.1
AVNACLPRNUIRSUCLILAN
EPSS
0.20%
8.9th percentile
Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

Affected

4 ranges
VendorProductVersion rangeFixed in
mozillafirefox< Firefox 157Firefox 157
mozillafirefox< 157.0.0157.0.0
mozillathunderbird< Thunderbird 157Thunderbird 157
mozillathunderbird< 157.0157.0
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.