{"id":"CVE-2026-115389","published":"2026-10-22T19:17:46.330","lastModified":"2026-10-22T19:17:46.453","description":"Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.","cvssScore":2.3,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L","cwes":["CWE-770"],"vendors":[],"products":[],"references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","tags":[]},{"url":"https://www.vulncheck.com/advisories/wasmtime-before-36.0.16-37.0.0-before-48.0.3-and-49.0.0-before-49.0.1-denial-of-service-via-val-api","tags":[]}],"exploitRefs":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","tags":[]}],"hasPoc":true,"ai":null}