{"id":"CVE-2026-119143","aliases":["RUSTSEC-2026-0357","GHSA-93g3-36p8-x2gc"],"title":"Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic via Zero-Length Stream Writes","titleSource":"VulnCheck","descriptionSource":"OSV","description":"This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-93g3-36p8-x2gc\nFor more information see the GitHub-hosted security advisory.","severity":"medium","score":5.9,"published":"2026-10-14T12:00:00.000Z","modified":"2026-10-30T02:56:10.460Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"crates.io","name":"wasmtime","sources":[{"name":"OSV · RUSTSEC-2026-0357","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0357"}],"ranges":[{"events":[{"introduced":"46.0.0"},{"fixed":"48.0.6"},{"introduced":"49.0.0"},{"fixed":"49.0.3"}],"type":"SEMVER"}],"versions":[],"fixed":["48.0.6","49.0.3"]}],"sourceAffected":[],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-93g3-36p8-x2gc","https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.6-and-49.0.0-before-49.0.3-panic-via-zero-length-stream-writes","https://crates.io/crates/wasmtime","https://rustsec.org/advisories/RUSTSEC-2026-0357.html","https://github.com/bytecodealliance/wasmtime/pull/14740"],"sources":[{"name":"CVE","id":"CVE-2026-119143","modified":"2026-10-29T15:58:21.991Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-119143"},{"name":"OSV","id":"RUSTSEC-2026-0357","modified":"2026-10-30T02:56:10.460415856Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0357"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":5.9},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","score":4.8},{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":5.9}],"cve":{"records":[{"id":"CVE-2026-119143","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-29T14:28:41.595Z","published":"2026-10-29T15:58:21.991Z","modified":"2026-10-29T15:58:21.991Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-29T15:58:21.991Z"}],"references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-93g3-36p8-x2gc","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.6-and-49.0.0-before-49.0.3-panic-via-zero-length-stream-writes","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-129","description":"Improper Validation of Array Index","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"46.0.0","versionEndExcluding":"48.0.6"},{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"49.0.0","versionEndExcluding":"49.0.3"}]}]}]}],"prioritization":[]},"products":[{"vendor":"bytecodealliance","name":"wasmtime","platforms":[],"versions":[{"version":"46.0.0","status":"affected","lessThan":"48.0.6","versionType":"semver"},{"version":"48.0.6","status":"unaffected","versionType":"semver"},{"version":"49.0.0","status":"affected","lessThan":"49.0.3","versionType":"semver"},{"version":"49.0.3","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-2026-119143"}],"remediation":[],"observedAt":"2026-10-30T03:25:56.728Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T10:20:31.211Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T03:30:32.339Z","attemptedAt":"2026-10-30T03:30:32.339Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T03:30:32.001Z","attemptedAt":"2026-10-30T03:30:32.001Z"},{"source":"EUVD","status":"refresh-failed","attemptedAt":"2026-10-30T03:30:32.341Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T03:30:32.341Z","attemptedAt":"2026-10-30T03:30:32.341Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-368p-492j-h227","url":"https://github.com/advisories/GHSA-368p-492j-h227","modified":"2026-10-29T18:31:09Z","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","checkedAt":"2026-10-30T03:30:32.001Z"},{"source":"NVD","id":"CVE-2026-119143","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119143","modified":"2026-10-29T16:18:08.073","score":5.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/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":"2026-10-30T03:30:32.339Z"},{"source":"NVD","id":"CVE-2026-119143","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119143","modified":"2026-10-29T16:18:08.073","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","checkedAt":"2026-10-30T03:30:32.339Z"}],"aiSummary":{"text":"Wasmtime versions 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 may panic via zero-length stream writes. The weakness is due to improper validation. Local access is required.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:12:01.895Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-119143"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0357"}]}}