{"id":"OSV-2026-867","aliases":[],"status":"published","title":"Bad-cast to std::__shared_weak_count from invalid vptr","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=520147546\n\n```\nCrash type: Bad-cast\nCrash state:\nBad-cast to std::__shared_weak_count from invalid vptr\nstd::__1::shared_ptr\u003cAssimp::STEP::EXPRESS::DataType const\u003e::shared_ptr\nAssimp::STEP::ReadFileHeader\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-06-07T00:02:11.977245Z","modified":"2026-10-24T16:15:02Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"assimp","ranges":[{"type":"GIT","events":[{"introduced":"cac67afe479ac9be595d03bfa811d0e6a6baf39a"},{"fixed":"d59e42da06d4e182845aa47dab5848269efd998d"}]}]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=520147546","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2026-867","title":"Bad-cast to std::__shared_weak_count from invalid vptr","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=520147546\n\n```\nCrash type: Bad-cast\nCrash state:\nBad-cast to std::__shared_weak_count from invalid vptr\nstd::__1::shared_ptr\u003cAssimp::STEP::EXPRESS::DataType const\u003e::shared_ptr\nAssimp::STEP::ReadFileHeader\n```\n","status":"published","published":"2026-06-07T00:02:11.977245Z","modified":"2026-10-24T16:15:02.918052681Z","updated_at":"2026-11-02T15:52:50.263679Z"}]}}