{"id":"CVE-2026-119135","revision":"de8f0ec4ffeb4c30831fceff8498ed86","records":[{"revision":"de8f0ec4ffeb4c30831fceff8498ed86","observedAt":"2026-10-30T03:49:22.01+00:00","statement":{"source":"nvd","id":"CVE-2026-119135","aliases":[],"title":"Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 panics when the host reads a component model stream as a different Rust item type than it was created with, because the host-to-host read path asserts matching TypeIds instead of return…","description":"Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 panics when the host reads a component model stream as a different Rust item type than it was created with, because the host-to-host read path asserts matching TypeIds instead of returning an error. Guest code can return a host-created StreamReader<U> that the embedder reads as StreamReader<T>, where both types map to the same component model type, crashing the embedding process.","state":0,"publishedAt":"2026-10-29T16:18:06.757+00:00","modifiedAt":"2026-10-29T16:18:06.87+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":5.9,"severity":"MEDIUM"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Primary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","score":4.8,"severity":"MEDIUM"}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-63h4-6cx9-pjfj","https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.6-and-49.0.0-before-49.0.3-panic-via-streamreader-type-mismatch"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-119135","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-617"],"productCriteria":[],"sourceDates":{"published":"2026-10-29T16:18:06.757","lastModified":"2026-10-29T16:18:06.870"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-119135","identifiers":["CVE-2026-119135"]},"retained":false,"historicalAffected":[]}],"coverage":[]}