{"id":"OSV-2026-2","aliases":[],"status":"published","title":"Heap-buffer-overflow in cmt_mpack_consume_uint_tag","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=472785094\n\n```\nCrash type: Heap-buffer-overflow WRITE 8\nCrash state:\ncmt_mpack_consume_uint_tag\ncmt_mpack_unpack_array\ncmt_mpack_unpack_map\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-01-03T00:15:15.907754Z","modified":"2026-01-03T00:15:15Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"fluent-bit","ranges":[{"type":"GIT","events":[{"introduced":"ef3f0750c741ae4586a093adf747bb77c932bec7"},{"fixed":"d6e65fb019a28ec2b16221e2753d4e3284e06ad0"}]}],"versions":["v4.2.1","v4.2.2"]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=472785094","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2026-2","title":"Heap-buffer-overflow in cmt_mpack_consume_uint_tag","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=472785094\n\n```\nCrash type: Heap-buffer-overflow WRITE 8\nCrash state:\ncmt_mpack_consume_uint_tag\ncmt_mpack_unpack_array\ncmt_mpack_unpack_map\n```\n","status":"published","published":"2026-01-03T00:15:15.907754Z","modified":"2026-01-03T00:15:15.90813Z","updated_at":"2026-11-02T15:52:50.263679Z"}]}}