Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
No PoCs from references.
- https://github.com/5211-yx/javascript_fuzzer
- https://github.com/googleprojectzero/fuzzilli