{"schema":"threatline.record/2","record":{"id":"CVE-2026-115384","aliases":["GHSA-32h6-97mm-8q3c"],"summary":"Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Stack Buffer Overflow","details":"Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped component-model-async callback functions to overwrite return addresses, crashing the host or escaping the sandbox.","categories":["Unclassified"],"product":"wasmtime","vendor":"bytecodealliance","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115384","source_modified_at":"2026-10-22T19:13:51.422Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"wasmtime","vendor":"bytecodealliance","versions":[{"lessThan":"48.0.4","status":"affected","version":"39.0.0","versionType":"semver"},{"status":"unaffected","version":"48.0.4","versionType":"semver"},{"lessThan":"49.0.2","status":"affected","version":"49.0.0","versionType":"semver"},{"status":"unaffected","version":"49.0.2","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","source_modified_at":"2026-10-23T18:33:27Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"ecosystem":"rust","name":"wasmtime"},"range":">= 39.0.0, < 48.0.4"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","source_modified_at":"2026-10-23T18:33:27Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"ecosystem":"rust","name":"wasmtime"},"range":">= 49.0.0, < 49.0.2"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115384","source_modified_at":"2026-10-22T19:13:51.422Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"48.0.4","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115384","source_modified_at":"2026-10-22T19:13:51.422Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"49.0.2","basis":"first unaffected version stated in the CVE record"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","source_modified_at":"2026-10-23T18:33:27Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"ecosystem":"rust","name":"wasmtime"},"version":"48.0.4"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","source_modified_at":"2026-10-23T18:33:27Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"ecosystem":"rust","name":"wasmtime"},"version":"49.0.2"}],"cvss":9.4,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00312,"percentile":0.22857,"score_date":"2026-10-23"},"published_at":"2026-10-22T19:13:51.422Z","modified_at":"2026-10-23T18:33:27Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115384","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T19:13:51.422Z"},{"source":"GitHub Advisory Database","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","fetched_at":"2026-10-24T00:31:04.721601Z","source_modified_at":"2026-10-23T18:33:27Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115384","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/wasmtime-39.0.0-before-48.0.4-and-49.0.0-before-49.0.2-stack-buffer-overflow","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T18:33:27Z","content_hash":"f9d1270db0d8d790ff93fda989740254b6b7226f413287dfbbfe2675efa100eb"}}