{"id":"OSV-2026-646","aliases":[],"status":"published","title":"Heap-buffer-overflow in sentencepiece::unigram::Model::EncodeOptimized","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=507169860\n\n```\nCrash type: Heap-buffer-overflow READ 8\nCrash state:\nsentencepiece::unigram::Model::EncodeOptimized\nsentencepiece::unigram::Model::Encode\nsentencepiece::SentencePieceProcessor::Encode\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-04-29T00:04:02.16483Z","modified":"2026-04-29T00:04:02Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"sentencepiece","ranges":[{"type":"GIT","events":[{"introduced":"ea83729ca83c4696a775d3d1e8a03e3bd4fa8d97"},{"fixed":"eb3ba49278fd10e5ae7b1d71c87f50e5a842f541"}]}]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=507169860","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2026-646","title":"Heap-buffer-overflow in sentencepiece::unigram::Model::EncodeOptimized","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=507169860\n\n```\nCrash type: Heap-buffer-overflow READ 8\nCrash state:\nsentencepiece::unigram::Model::EncodeOptimized\nsentencepiece::unigram::Model::Encode\nsentencepiece::SentencePieceProcessor::Encode\n```\n","status":"published","published":"2026-04-29T00:04:02.16483Z","modified":"2026-04-29T00:04:02.16514Z","updated_at":"2026-11-02T15:52:50.263679Z"}]}}