{"id":"CVE-2026-118688","revision":"cf2d9ce9e49e432ba1d8d34c662e29fb","records":[{"revision":"cf2d9ce9e49e432ba1d8d34c662e29fb","observedAt":"2026-11-04T16:54:02.813+00:00","statement":{"source":"cve-program","id":"CVE-2026-118688","aliases":[],"title":"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","description":"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.","state":0,"publishedAt":"2026-10-28T18:59:56.965+00:00","modifiedAt":"2026-11-04T15:08:13.222+00:00","affected":[{"ecosystem":"Vendor product","name":"wasmtime","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"bytecodealliance\",\n                    \"product\": \"wasmtime\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:cargo/wasmtime-wasi\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"36.0.18\"\n                        },\n                        {\n                            \"version\": \"36.0.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"37.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"48.0.6\"\n                        },\n                        {\n                            \"version\": \"48.0.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"49.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"49.0.3\"\n                        },\n                        {\n                            \"version\": \"49.0.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L","score":8.8,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L","score":7.9,"severity":"HIGH"}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m9f7-9w4p-gv38","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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118688","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118688","identifiers":["CVE-2026-118688"]},"retained":false,"historicalAffected":[]}],"coverage":[]}