{"action":"Upgrade wasmtime to 43.0.1 or later.","affected":[{"fixed":"43.0.1","introduced":"43.0.0"}],"component":"wasmtime","cve_ids":["CVE-2026-34983"],"ecosystem":"crates.io","epss":0.00121,"exploited":false,"fixed_versions":["43.0.1"],"ghsa_id":"GHSA-hfr4-7c6c-48w2","id":"tcs_01M5KFB6RGGQERET6P5QBE2JXV","modified_at":"2026-10-12T18:00:09.243186370Z","published_at":"2026-04-09T12:00:00Z","references":["https://osv.dev/vulnerability/RUSTSEC-2026-0090","https://crates.io/crates/wasmtime","https://rustsec.org/advisories/RUSTSEC-2026-0090.html","https://github.com/bytecodealliance/wasmtime/issues/12069"],"severity":{"label":"medium","score":5},"sources":[{"source":"osv","source_id":"RUSTSEC-2026-0090","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0090"},{"source":"nvd","source_id":"CVE-2026-34983","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34983"}],"summary":"Use-after-free bug after cloning `wasmtime::Linker`"}