CVE-2026-115893: 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…

PriorityP262critical9.9CVSS 3.1

AVNACLPRLUINSCCHIHAH

EPSS

0.43%

37.3th percentile

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
bytecodealliance	wasmtime	< 36.0.19	36.0.19
bytecodealliance	wasmtime	—	—
bytecodealliance	wasmtime	—	—

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