{"id":"CVE-2026-115389","aliases":[],"cve":{"records":[{"id":"CVE-2026-115389","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-22T11:27:18.001Z","published":"2026-10-22T19:13:55.163Z","modified":"2026-10-29T12:12:04.439Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-22T19:13:55.163Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T12:12:04.439Z"}],"references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","tags":["vendor-advisory"],"source":"VulnCheck"},{"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":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-770","description":"Allocation of Resources Without Limits or Throttling","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionEndExcluding":"36.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"37.0.0","versionEndExcluding":"48.0.3"},{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"49.0.0","versionEndExcluding":"49.0.1"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-29T12:11:28.782126Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"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","titleSource":"VulnCheck","descriptionSource":"VulnCheck","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.","score":2.3,"severity":"low","published":"2026-10-22T19:13:55.163Z","modified":"2026-10-29T12:12:04.439Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"bytecodealliance","name":"wasmtime","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"36.0.16","versionType":"semver"},{"version":"36.0.16","status":"unaffected","versionType":"semver"},{"version":"37.0.0","status":"affected","lessThan":"48.0.3","versionType":"semver"},{"version":"48.0.3","status":"unaffected","versionType":"semver"},{"version":"49.0.0","status":"affected","lessThan":"49.0.1","versionType":"semver"},{"version":"49.0.1","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/wasmtime","packageIdentity":{"ecosystem":"crates.io","name":"wasmtime"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-115389"}],"remediation":[],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqpg-j7w6-42pr","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"],"sources":[{"name":"CVE","id":"CVE-2026-115389","modified":"2026-10-29T12:12:04.439Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-115389"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":1},{"source":"VulnCheck","vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L","score":2.3}],"sourceAffected":[],"observedAt":"2026-10-29T14:34:24.379Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T11:20:32.820Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-29T12:35:32.184Z","attemptedAt":"2026-10-29T12:35:32.184Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-29T12:35:32.680Z","attemptedAt":"2026-10-29T12:35:32.680Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T12:35:32.979Z","attemptedAt":"2026-10-29T12:35:32.979Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-29T12:35:34.222Z","attemptedAt":"2026-10-29T12:35:34.222Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-115389","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115389","modified":"2026-10-22T19:17:46.453","score":1,"vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/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","checkedAt":"2026-10-29T12:35:32.184Z"},{"source":"NVD","id":"CVE-2026-115389","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115389","modified":"2026-10-22T19:17:46.453","score":2.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L","checkedAt":"2026-10-29T12:35:32.184Z"},{"source":"GitHub Advisory Database","id":"GHSA-3g9q-2gmg-4cvp","url":"https://github.com/advisories/GHSA-3g9q-2gmg-4cvp","modified":"2026-10-22T21:32:45Z","score":2.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L","checkedAt":"2026-10-29T12:35:32.680Z"},{"source":"ENISA EUVD","id":"EUVD-2026-108320","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108320","modified":"Oct 22, 2026, 7:13:55 PM","score":1,"vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","checkedAt":"2026-10-29T12:35:32.979Z"},{"source":"FIRST EPSS","id":"CVE-2026-115389","url":"https://www.first.org/epss/","probability":0.00153,"percentile":0.04374,"date":"2026-10-28","checkedAt":"2026-10-29T12:35:34.222Z"}],"aiSummary":{"text":"Wasmtime versions before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 may be vulnerable to denial of service. A malicious WebAssembly guest can cause excessive host memory allocation. The weakness is due to inadequate accounting for host allocations through the Val API.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:24:48.208Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-115389"}]}}