{"id":"CVE-2026-115384","aliases":[],"cve":{"records":[{"id":"CVE-2026-115384","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-22T11:25:27.610Z","published":"2026-10-22T19:13:51.422Z","modified":"2026-10-29T02:30:40.462Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-22T19:13:51.422Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T02:30:40.462Z"}],"references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/wasmtime-39.0.0-before-48.0.4-and-49.0.0-before-49.0.2-stack-buffer-overflow","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-20","description":"Improper Input Validation","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"39.0.0","versionEndExcluding":"48.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"49.0.0","versionEndExcluding":"49.0.2"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-29T02:30:31.803813Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Stack Buffer Overflow","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped component-model-async callback functions to overwrite return addresses, crashing the host or escaping the sandbox.","score":9.9,"severity":"critical","published":"2026-10-22T19:13:51.422Z","modified":"2026-10-29T02:30:40.462Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"bytecodealliance","name":"wasmtime","platforms":[],"versions":[{"version":"39.0.0","status":"affected","lessThan":"48.0.4","versionType":"semver"},{"version":"48.0.4","status":"unaffected","versionType":"semver"},{"version":"49.0.0","status":"affected","lessThan":"49.0.2","versionType":"semver"},{"version":"49.0.2","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-2026-115384"}],"remediation":[],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c","https://www.vulncheck.com/advisories/wasmtime-39.0.0-before-48.0.4-and-49.0.0-before-49.0.2-stack-buffer-overflow"],"sources":[{"name":"CVE","id":"CVE-2026-115384","modified":"2026-10-29T02:30:40.462Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-115384"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":9.4},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9}],"sourceAffected":[],"observedAt":"2026-10-29T14:34:24.379Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T12:15:32.680Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-29T08:10:31.274Z","attemptedAt":"2026-10-29T08:10:31.274Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-29T08:10:31.439Z","attemptedAt":"2026-10-29T08:10:31.439Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T08:10:31.274Z","attemptedAt":"2026-10-29T08:10:31.274Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-29T08:10:31.274Z","attemptedAt":"2026-10-29T08:10:31.274Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-115384","url":"https://www.first.org/epss/","probability":0.00312,"percentile":0.23984,"date":"2026-10-28","checkedAt":"2026-10-29T08:10:31.274Z"},{"source":"NVD","id":"CVE-2026-115384","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115384","modified":"2026-10-29T04:18:27.420","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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":"2026-10-29T08:10:31.274Z"},{"source":"NVD","id":"CVE-2026-115384","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115384","modified":"2026-10-29T04:18:27.420","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","checkedAt":"2026-10-29T08:10:31.274Z"},{"source":"ENISA EUVD","id":"EUVD-2026-108311","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108311","modified":"Oct 29, 2026, 2:30:40 AM","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","checkedAt":"2026-10-29T08:10:31.274Z"},{"source":"GitHub Advisory Database","id":"GHSA-6fff-wrjr-wjxr","url":"https://github.com/advisories/GHSA-6fff-wrjr-wjxr","modified":"2026-10-22T21:32:44Z","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","checkedAt":"2026-10-29T08:10:31.439Z"}],"aiSummary":{"text":"Wasmtime versions 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contain a stack buffer overflow vulnerability, allowing malicious guests to write to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped callback functions to overwrite return addresses. This may crash the host or escape the sandbox.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T08:42:48.355Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-115384"}]}}