{"id":"CVE-2026-34987","aliases":["RUSTSEC-2026-0095","GHSA-xx5w-cvp6-jv83"],"title":"Wasmtime with Winch compiler backend may allow a sandbox-escaping memory access","summary":"Wasmtime with Winch compiler backend may allow a sandbox-escaping memory access","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":"2026-10-12T18:00:08.330233116Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0095","references":[{"url":"https://crates.io/crates/wasmtime"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0095.html"},{"url":"https://github.com/bytecodealliance/wasmtime/pull/13014"}],"tags":["osv","rust"],"epss":0.0049,"epssPercentile":0.40344,"ingestedAt":"2026-10-13T11:45:30.188Z","slug":"CVE-2026-34987","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-xx5w-cvp6-jv83\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":[]}