{"id":"RUSTSEC-2026-0268","summary":"Guest controlled-size host heap allocation through WASIp3 streams","details":"This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-x84v-gj2h-g759\nFor more information see the GitHub-hosted security advisory.","aliases":["GHSA-x84v-gj2h-g759"],"modified":"2026-08-31T08:30:02.704463075Z","published":"2026-08-20T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/wasmtime"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2026-0268.html"},{"type":"ADVISORY","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-x84v-gj2h-g759"}],"affected":[{"package":{"name":"wasmtime","ecosystem":"crates.io","purl":"pkg:cargo/wasmtime"},"ranges":[{"type":"SEMVER","events":[{"introduced":"46.0.0"},{"fixed":"46.0.3"},{"introduced":"47.0.0"},{"fixed":"47.0.4"}]}],"ecosystem_specific":{"affects":{"arch":[],"os":[],"functions":[]},"affected_functions":null},"database_specific":{"cvss":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","informational":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0268.json","categories":[]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"}]}