Vulnerability in Bytecodealliance Wasmtime

CVE-2026-34945

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a bug where a 64-bit table, part of the memory64 proposal of WebAssembly, incorrectly translated the table.size ins…

EPSS: 0.000 (2.7th percentile) — read the EPSS interpretation.

Affected products

Bytecodealliance Wasmtime — versions >= 25.0.0, < 36.0.7, >= 37.0.0, < 42.0.2, >= 43.0.0, < 44.0.1

Weakness classification (CWE)

CWE-681 — Incorrect Conversion between Numeric Types

References

https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m9w2-8782-2946 (x_refsource_CONFIRM)