{"schema":"threatline.record/2","record":{"id":"CVE-2026-115893","aliases":["GHSA-mghf-wjfp-p5xm"],"summary":"Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction","details":"Wasmtime is a runtime for WebAssembly. Prior to 36.0.19, 48.0.7, and 49.0.4, the Cranelift compiler backend on aarch64 can compile a Wasm br_table instruction with more than approximately 256,000 targets so that it has an incorrect conditional branch target. The branch can then jump to arbitrary other code at a user-controlled offset, allowing a user-controlled Wasm module to escape the sandbox on aarch64 engines using the default Cranelift backend. This issue is fixed in versions 36.0.19, 48.0.7, and 49.0.4.","categories":["Unclassified"],"product":"wasmtime","vendor":"bytecodealliance","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115893","source_modified_at":"2026-10-23T21:29:33.917Z","fetched_at":"2026-10-23T21:47:51.402276Z","product":"wasmtime","vendor":"bytecodealliance","versions":[{"status":"affected","version":"< 36.0.19"},{"status":"affected","version":">= 37.0.0, < 48.0.7"},{"status":"affected","version":">= 49.0.0, < 49.0.4"}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.9,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00792,"percentile":0.559,"score_date":"2026-10-24"},"published_at":"2026-10-23T21:29:33.917Z","modified_at":"2026-10-23T21:29:33.917Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115893","fetched_at":"2026-10-23T21:47:51.402276Z","source_modified_at":"2026-10-23T21:29:33.917Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115893","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mghf-wjfp-p5xm","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/pull/14818","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/pull/14819","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/pull/14820","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/pull/14826","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/commit/e61df1b454be9313d61a5f8de07722a421139bbe","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/commit/f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.19","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4","tags":["x_refsource_MISC"]}],"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":"2026-10-23T21:29:33.917Z","content_hash":"ee4fa81711c7d1f360b8c4616ea7391efa64f67060bde1dd527d41eed3bdbe4a"}}