{"id":"RUSTSEC-2026-0268","aliases":["GHSA-x84v-gj2h-g759"],"title":"Guest controlled-size host heap allocation through WASIp3 streams","summary":"Guest controlled-size host heap allocation through WASIp3 streams","severity":"none","vendor":"wasmtime","product":"wasmtime","ecosystem":"rust","affected":["wasmtime >= 47.0.0, < 47.0.4"],"patched":["wasmtime 47.0.4"],"published":"2026-08-20","updated":"2026-08-31","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0268","references":[{"url":"https://crates.io/crates/wasmtime"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0268.html"},{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-x84v-gj2h-g759"}],"tags":["osv","rust"],"ingestedAt":"2026-08-31T19:30:40.179Z","slug":"RUSTSEC-2026-0268","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-x84v-gj2h-g759\nFor more information see the GitHub-hosted security advisory.\n\n## Affected packages\n\n- `wasmtime >= 47.0.0, < 47.0.4`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `wasmtime 47.0.4`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}