CVE-2026-100792High· 7.1▾ TwilightJIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
— → 7.1
none → high
0.2% → 0.3%
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-103500Medium· 6.1An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size
CVE-2026-100793Medium· 6.5JIT miscompilation in the JavaScript Engine component
CVE-2026-100794Critical· 9.6Sandbox escape due to incorrect boundary conditions in the Internationalization component
CVE-2026-100788Critical· 9.8Invalid pointer in the JavaScript: WebAssembly component
CVE-2026-92238Critical· 9.8A maliciously constructed mail header could lead to multiple fields being parsed as one, or potential memory safety violations
CVE-2026-92239High· 8.1A maliciously constructed IMAP line could cause an out-of-bounds buffer read