{"id":"RUSTSEC-2026-0378","aliases":["GHSA-9pvw-hwfg-92h5"],"title":"Panic lowering a host-created component model stream into a guest that expects a different payload type","summary":"Panic lowering a host-created component model stream into a guest that expects a different payload type","severity":"none","vendor":"wasmtime","product":"wasmtime","ecosystem":"rust","affected":["wasmtime >= 49.0.0, < 49.0.4"],"patched":["wasmtime 49.0.4"],"published":"2026-10-19","updated":"2026-10-20","sourceUpdated":"2026-10-20T11:15:37.066435437Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0378","references":[{"url":"https://crates.io/crates/wasmtime"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0378.html"},{"url":"https://github.com/bytecodealliance/wasmtime/pull/14827"}],"tags":["osv","rust"],"ingestedAt":"2026-10-21T11:54:42.769Z","slug":"RUSTSEC-2026-0378","body":"## Overview\n\nThis is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg-92h5\nFor more information see the GitHub-hosted security advisory.\n\n## Affected packages\n\n- `wasmtime >= 49.0.0, < 49.0.4`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `wasmtime 49.0.4`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}