{"id":"OSV-2026-764","aliases":[],"status":"published","title":"Heap-use-after-free in JS_DefineProperty","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=513811188\n\n```\nCrash type: Heap-use-after-free READ 8\nCrash state:\nJS_DefineProperty\nbuild_backtrace\nJS_CallInternal\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-05-18T00:08:58.747302Z","modified":"2026-05-18T00:08:58Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"quickjs","ranges":[{"type":"GIT","events":[{"introduced":"d7ae12ae71dfd6ab2997527d295014a8996fa0f9"},{"fixed":"d73189dd5a582c19c565774bd56fed4e72d33c99"}]}]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=513811188","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2026-764","title":"Heap-use-after-free in JS_DefineProperty","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=513811188\n\n```\nCrash type: Heap-use-after-free READ 8\nCrash state:\nJS_DefineProperty\nbuild_backtrace\nJS_CallInternal\n```\n","status":"published","published":"2026-05-18T00:08:58.747302Z","modified":"2026-05-18T00:08:58.747613Z","updated_at":"2026-11-02T15:52:50.263679Z"}]}}