{"id":"OSV-2026-1309","summary":"Heap-buffer-overflow in janet_bytecode_movopt_basic_block","details":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=563659412\n\n```\nCrash type: Heap-buffer-overflow READ 4\nCrash state:\njanet_bytecode_movopt_basic_block\njanet_bytecode_movopt_full\njanet_bytecode_optimize\n```\n","modified":"2026-09-21T00:10:08.003883Z","published":"2026-09-21T00:10:08.003546Z","references":[{"type":"REPORT","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=563659412"}],"affected":[{"package":{"name":"janet","ecosystem":"OSS-Fuzz","purl":"pkg:generic/janet"},"ranges":[{"type":"GIT","repo":"https://github.com/janet-lang/janet","events":[{"introduced":"c29050eeda52d117095d2551b7abcf2e98cc9574"},{"fixed":"d763d0d51afddceeb251bc6dd6e9458cc4ec0484"}]}],"ecosystem_specific":{"severity":"MEDIUM"},"database_specific":{"fixed_range":"4fc4c8c351aa7062083cd5ce9ffe411f1c3ae64d:d763d0d51afddceeb251bc6dd6e9458cc4ec0484","introduced_range":"832159a677e3fd1c45a6fe88427e05555acc7a36:4fc4c8c351aa7062083cd5ce9ffe411f1c3ae64d","source":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/janet/OSV-2026-1309.yaml"}}],"schema_version":"1.9.0"}