{"affected":[{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"wasmtime","product":"wasmtime","source":"CNA: VulnCheck","vendor":"bytecodealliance","versions":[{"lessThan":"48.0.6","status":"affected","version":"46.0.0","versionType":"semver"},{"status":"unaffected","version":"48.0.6","versionType":"semver"},{"lessThan":"49.0.3","status":"affected","version":"49.0.0","versionType":"semver"},{"status":"unaffected","version":"49.0.3","versionType":"semver"}]}],"cveId":"CVE-2026-119143","cwes":["CWE-129"],"description":"Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows guest code to trigger a host panic through out-of-bounds zero-length stream operations. Malicious guests can perform zero-length component model stream reads or writes with unvalidated addresses, causing Direct{Source,Destination}::remaining to panic and crash WASIp3 embedders.","epss":{"date":"2026-11-03","percentile":0.11494,"score":0.00212},"exploits":[],"kev":null,"metrics":[{"score":5.9,"severity":"medium","source":"CNA: 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","version":"4.0"},{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793755772979,"publishedAt":1793289501991,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-93g3-36p8-x2gc"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"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"}],"remediation":[],"revision":"52b1785cd15e5bffc4562bae9dcb1de5fda91d6dd5583d5d632c56345d2e7b61","sources":[{"modifiedAt":1793755772979,"name":"CNA: VulnCheck","retrievedAt":1793758138391,"url":"https://www.cve.org/CVERecord?id=CVE-2026-119143"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793758140529,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-119143"}],"ssvc":{"assessedAt":1793755764420,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic via Zero-Length Stream Writes","updatedAt":1793758140529}