{"schema":"threatline.record/2","record":{"id":"CVE-2026-118688","aliases":["GHSA-m9f7-9w4p-gv38"],"summary":"Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 Sandbox Escape via Symlink Rename","details":"wasmtime-wasi in Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 re-appends a trailing slash to rename source paths, causing renameat on macOS and FreeBSD hosts to follow directory symlinks. A guest with sandbox write access can rename a relative symlink such as \"up/\" to move host directories into its sandbox and read or write them.","categories":["Unclassified"],"product":"wasmtime","vendor":"bytecodealliance","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118688","source_modified_at":"2026-10-28T18:59:56.965Z","fetched_at":"2026-10-28T20:58:01.013507Z","product":"wasmtime","vendor":"bytecodealliance","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"36.0.18"},{"version":"36.0.18","status":"unaffected","versionType":"semver"},{"version":"37.0.0","status":"affected","versionType":"semver","lessThan":"48.0.6"},{"version":"48.0.6","status":"unaffected","versionType":"semver"},{"version":"49.0.0","status":"affected","versionType":"semver","lessThan":"49.0.3"},{"version":"49.0.3","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118688","source_modified_at":"2026-10-28T18:59:56.965Z","fetched_at":"2026-10-28T20:58:01.013507Z","package":{"name":"wasmtime","ecosystem":null},"version":"36.0.18","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118688","source_modified_at":"2026-10-28T18:59:56.965Z","fetched_at":"2026-10-28T20:58:01.013507Z","package":{"name":"wasmtime","ecosystem":null},"version":"48.0.6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118688","source_modified_at":"2026-10-28T18:59:56.965Z","fetched_at":"2026-10-28T20:58:01.013507Z","package":{"name":"wasmtime","ecosystem":null},"version":"49.0.3","basis":"first unaffected version stated in the CVE record"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T18:59:56.965Z","modified_at":"2026-10-28T18:59:56.965Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-118688","fetched_at":"2026-10-28T20:58:01.013507Z","source_modified_at":"2026-10-28T18:59:56.965Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m9f7-9w4p-gv38","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/wasmtime-before-36.0.18-37.0.0-before-48.0.6-and-49.0.0-before-49.0.3-sandbox-escape-via-symlink-rename","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-28T18:59:56.965Z","content_hash":"17f6ccaae081d1c229c9c3c3d0a80b1ff054d3f90fbeb2574ea579d1db8a014f"}}