{"id":"CVE-2026-34944","aliases":["RUSTSEC-2026-0087","GHSA-qqfj-4vcm-26hv"],"title":"Wasmtime segfault or unused out-of-sandbox load with `f64x2.splat` operator on Cranelift x86-64","summary":"Wasmtime segfault or unused out-of-sandbox load with `f64x2.splat` operator on Cranelift x86-64","severity":"none","vendor":"wasmtime","product":"wasmtime","ecosystem":"rust","affected":["wasmtime >= 43.0.0, < 43.0.1"],"patched":["wasmtime 43.0.1"],"published":"2026-04-09","updated":"2026-10-12","sourceUpdated":"2026-10-12T18:00:14.305574647Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0087","references":[{"url":"https://crates.io/crates/wasmtime"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0087.html"},{"url":"https://github.com/bytecodealliance/wasmtime/pull/13011"}],"tags":["osv","rust"],"epss":0.00255,"epssPercentile":0.15723,"ingestedAt":"2026-10-13T11:45:30.186Z","slug":"CVE-2026-34944","body":"## Overview\n\nThis is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-qqfj-4vcm-26hv\nFor more information see the GitHub-hosted security advisory.\n\n## Affected packages\n\n- `wasmtime >= 43.0.0, < 43.0.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `wasmtime 43.0.1`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}