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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-115893)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2026-115893)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
478020	Chainguard: wasmcloud: security update to 2.10.3-r3	Tenable Cloud Security	Chainguard Local Security Checks	Local	critical
478020	Chainguard: wasmcloud: security update to 2.10.3-r3	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	critical
371707	Linux Distros Unpatched Vulnerability : CVE-2026-115893	Nessus	Misc.	Local	critical

Detections

Analytics

CVE-2026-115893

critical

Tenable Plugins

critical

critical

critical