{"answers":{"affected":"1 open source package ship an affected version, including wasmtime-wasi.","exploited":"There is no known exploitation of CVE-2026-118688 in the wild and no public exploit code.","fix":"Upgrade wasmtime-wasi to a fixed version for your release line: 36.0.18, 48.0.6 or 49.0.3.","what":"CVE-2026-118688 is a high-severity vulnerability in bytecodealliance wasmtime, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118688 and fix it if it is affected.\n\nWhat it is: CVE-2026-118688 is a high-severity vulnerability in bytecodealliance wasmtime, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118688 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- wasmtime-wasi (crates.io): affected from 0.0.0-0; fixed in 36.0.18, 48.0.6, 49.0.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-118688/ (Markdown: https://insights.sbomify.com/CVE-2026-118688/index.md)","id":"CVE-2026-118688","markdown":"https://insights.sbomify.com/CVE-2026-118688/index.md","name":"CVE-2026-118688","record":{"aliases":["DEBIAN-CVE-2026-118688","GHSA-63fr-xrxj-8wrx","GHSA-m9f7-9w4p-gv38","RUSTSEC-2026-0352"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-61","name":"UNIX Symbolic Link (Symlink) Following"}],"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.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"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","id":"CVE-2026-118688","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"OvenMediaEngine through 0.21.0 OVT Relay DoS via Oversized payload_length","id":"CVE-2026-118689"},"packages":[{"ecosystem":"crates.io","fixed":["36.0.18","48.0.6","49.0.3"],"introduced":["0.0.0-0","37.0.0","49.0.0"],"last_affected":[],"package":"wasmtime-wasi","purl":"pkg:cargo/wasmtime-wasi","source":"RUSTSEC-2026-0352"}],"prev":{"headline":"Coder before 2.29.21, 2.30.0 before 2.34.12, 2.35.0 before 2.35.9, 2.36.0 before 2.36.7, and 2.37.0 before 2.37.4 does not validate the audi","id":"CVE-2026-118687"},"products":["wasmtime"],"published":"2026-10-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-28","vendors":["bytecodealliance"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-118688/"}