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CVE-2025-0240

Description

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.

POC

Reference

No PoCs from references.

Github

- https://github.com/5211-yx/javascript_fuzzer

- https://github.com/googleprojectzero/fuzzilli