{"schema":"threatline.record/2","record":{"id":"CVE-2026-115389","aliases":["GHSA-jqpg-j7w6-42pr"],"summary":"Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 Denial of Service via Val API","details":"Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.","categories":["Unclassified"],"product":"wasmtime","vendor":"bytecodealliance","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115389","source_modified_at":"2026-10-22T19:13:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"wasmtime","vendor":"bytecodealliance","versions":[{"lessThan":"36.0.16","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"36.0.16","versionType":"semver"},{"lessThan":"48.0.3","status":"affected","version":"37.0.0","versionType":"semver"},{"status":"unaffected","version":"48.0.3","versionType":"semver"},{"lessThan":"49.0.1","status":"affected","version":"49.0.0","versionType":"semver"},{"status":"unaffected","version":"49.0.1","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","source_modified_at":"2026-10-23T18:33:10Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"rust","name":"wasmtime"},"range":"<= 36.0.15"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","source_modified_at":"2026-10-23T18:33:10Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"rust","name":"wasmtime"},"range":">= 37.0.0, <= 48.0.2"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","source_modified_at":"2026-10-23T18:33:10Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"rust","name":"wasmtime"},"range":"49.0.0"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115389","source_modified_at":"2026-10-22T19:13:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"36.0.16","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115389","source_modified_at":"2026-10-22T19:13:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"48.0.3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115389","source_modified_at":"2026-10-22T19:13:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"49.0.1","basis":"first unaffected version stated in the CVE record"},{"source":"GitHub Advisory 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rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T18:33:10Z","content_hash":"3caf20eb6354c7b578f40550d590ea4e7b3f47bdcb2225e6ae2b51b8114b4e75"}}