{"id":"CVE-2026-119134","aliases":["RUSTSEC-2026-0363","GHSA-q554-3cjc-rx7p"],"title":"Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 Unbounded Memory Growth via Component-Model Resource Handles","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-q554-3cjc-rx7p\nFor more information see the GitHub-hosted security advisory.","severity":"medium","score":6.9,"published":"2026-10-14T12:00:00.000Z","modified":"2026-10-30T02:55:51.423Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"crates.io","name":"wasmtime","sources":[{"name":"OSV · RUSTSEC-2026-0363","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0363"}],"ranges":[{"events":[{"introduced":"0.0.0-0"},{"fixed":"36.0.18"},{"introduced":"37.0.0"},{"fixed":"48.0.6"},{"introduced":"49.0.0"},{"fixed":"49.0.3"}],"type":"SEMVER"}],"versions":[],"fixed":["36.0.18","48.0.6","49.0.3"]}],"sourceAffected":[],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-q554-3cjc-rx7p","https://www.vulncheck.com/advisories/wasmtime-before-36.0.18-37.0.0-before-48.0.6-and-49.0.0-before-49.0.3-unbounded-memory-growth-via-component-model-resource-handles","https://crates.io/crates/wasmtime","https://rustsec.org/advisories/RUSTSEC-2026-0363.html","https://github.com/bytecodealliance/wasmtime/pull/14732"],"sources":[{"name":"CVE","id":"CVE-2026-119134","modified":"2026-10-29T20:14:16.506Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-119134"},{"name":"OSV","id":"RUSTSEC-2026-0363","modified":"2026-10-30T02:55:51.423013344Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0363"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":6.9},{"source":"VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.2},{"source":"OSV","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.2}],"cve":{"records":[{"id":"CVE-2026-119134","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-29T14:26:15.522Z","published":"2026-10-29T15:58:15.105Z","modified":"2026-10-29T20:14:16.506Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-29T15:58:15.105Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T20:14:16.506Z"}],"references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-q554-3cjc-rx7p","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/wasmtime-before-36.0.18-37.0.0-before-48.0.6-and-49.0.0-before-49.0.3-unbounded-memory-growth-via-component-model-resource-handles","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":"36.0.18"},{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"37.0.0","versionEndExcluding":"48.0.6"},{"vulnerable":true,"criteria":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","versionStartIncluding":"49.0.0","versionEndExcluding":"49.0.3"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-29T20:14:05.502819Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"products":[{"vendor":"bytecodealliance","name":"wasmtime","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"36.0.18","versionType":"semver"},{"version":"36.0.18","status":"unaffected","versionType":"semver"},{"version":"37.0.0","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-2026-119134"}],"remediation":[],"observedAt":"2026-10-30T03:26:08.927Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T11:20:32.820Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-29T20:25:33.812Z","attemptedAt":"2026-10-29T20:25:33.812Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-29T20:25:33.873Z","attemptedAt":"2026-10-29T20:25:33.873Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T20:25:33.139Z","attemptedAt":"2026-10-29T20:25:33.139Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-29T20:25:32.911Z","attemptedAt":"2026-10-29T20:25:32.911Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-113201","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-113201","modified":"Oct 29, 2026, 3:58:15 PM","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","checkedAt":"2026-10-29T20:25:33.139Z"},{"source":"NVD","id":"CVE-2026-119134","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119134","modified":"2026-10-29T16:18:06.703","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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":"2026-10-29T20:25:33.812Z"},{"source":"NVD","id":"CVE-2026-119134","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119134","modified":"2026-10-29T16:18:06.703","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-29T20:25:33.812Z"},{"source":"GitHub Advisory Database","id":"GHSA-59gg-q3p6-vwvr","url":"https://github.com/advisories/GHSA-59gg-q3p6-vwvr","modified":"2026-10-29T18:31:00Z","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-29T20:25:33.873Z"}],"aiSummary":{"text":"Wasmtime versions before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 have an unbounded memory growth weakness via component-model resource handles. This may be caused by allocation of resources without limits or throttling. The impact is uncertain.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:16:34.853Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-119134"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0363"}]}}