{"id":"CVE-2026-115893","revision":"97bd1ded14a4452db1df2b9087c6867e","records":[{"revision":"97bd1ded14a4452db1df2b9087c6867e","observedAt":"2026-10-23T22:48:20.692+00:00","statement":{"source":"cve-program","id":"CVE-2026-115893","aliases":[],"title":"Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction","description":"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.","state":0,"publishedAt":"2026-10-23T21:29:33.917+00:00","modifiedAt":"2026-10-23T21:29:33.917+00:00","affected":[{"ecosystem":"Vendor product","name":"wasmtime","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"bytecodealliance\",\n                    \"product\": \"wasmtime\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 36.0.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 37.0.0, < 48.0.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 49.0.0, < 49.0.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9,"severity":"CRITICAL"}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mghf-wjfp-p5xm","https://github.com/bytecodealliance/wasmtime/pull/14818","https://github.com/bytecodealliance/wasmtime/pull/14819","https://github.com/bytecodealliance/wasmtime/pull/14820","https://github.com/bytecodealliance/wasmtime/pull/14826","https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd","https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618","https://github.com/bytecodealliance/wasmtime/commit/e61df1b454be9313d61a5f8de07722a421139bbe","https://github.com/bytecodealliance/wasmtime/commit/f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa","https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.19","https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7","https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115893","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115893","identifiers":["CVE-2026-115893"]},"retained":false,"historicalAffected":[]}],"coverage":[]}