An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.
https://www.mozilla.org/security/advisories/mfsa2024-32/
https://www.mozilla.org/security/advisories/mfsa2024-31/
https://www.mozilla.org/security/advisories/mfsa2024-30/
https://www.mozilla.org/security/advisories/mfsa2024-29/
https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r