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UNKNOWNKNOWN EXPLOITED

CVE-2019-17026

Mozilla Firefox And Thunderbird Type Confusion Vulnerability

Published
2021-11-03
Modified
2026-07-31
Sources
cisa-kev

Summary

Mozilla Firefox and Thunderbird contain a type confusion vulnerability due to incorrect alias information in the IonMonkey JIT compiler when setting array elements.

References

Includes data from the CISA Known Exploited Vulnerabilities catalog.

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