CVEvulnerability
CVE-2026-115893
9.9 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-10-23
- Last modified
- 2026-10-23
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.9 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-691
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.
Related
Weakness · CWE (1)
- CWE-691 Insufficient Control Flow Management weakness
References
- https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd github.com
- https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618 github.com
- https://github.com/bytecodealliance/wasmtime/commit/e61df1b454be9313d61a5f8de07722a421139bbe github.com
- https://github.com/bytecodealliance/wasmtime/commit/f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa github.com
- https://github.com/bytecodealliance/wasmtime/pull/14818 github.com
- https://github.com/bytecodealliance/wasmtime/pull/14819 github.com
- https://github.com/bytecodealliance/wasmtime/pull/14820 github.com
- https://github.com/bytecodealliance/wasmtime/pull/14826 github.com
- https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.19 github.com
- https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7 github.com
- https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4 github.com
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mghf-wjfp-p5xm github.com