{"id":"CVE-2026-115385","title":"Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Host Panic via WASIp3 Timestamps","summary":"Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASIp3 implementation that allows guests to abort the Unix host process. Guests with mutable preopened directory acces…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-754"],"vendor":"bytecodealliance","product":"wasmtime","affected":["wasmtime >= 46.0.0 < 48.0.4","wasmtime >= 49.0.0 < 49.0.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-26T19:29:09.734230Z"},"published":"2026-10-22","updated":"2026-10-26","sourceUpdated":"2026-10-26T19:38:29.749Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115385","references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mr2v-56j5-cmfc","label":"GitHub Security Advisory (GHSA-mr2v-56j5-cmfc)"},{"url":"https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.4-and-49.0.0-before-49.0.2-host-panic-via-wasip3-timestamps","label":"VulnCheck Advisory: Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Host Panic via WASIp3 Timestamps"},{"url":"https://crates.io/crates/wasmtime-wasi"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0324.html"},{"url":"https://github.com/bytecodealliance/wasmtime/pull/14486"}],"tags":["cve.org","osv","rust"],"epss":0.00112,"epssPercentile":0.01372,"aliases":["RUSTSEC-2026-0324","GHSA-mr2v-56j5-cmfc"],"ecosystem":"rust","patched":["wasmtime-wasi 49.0.2"],"ingestedAt":"2026-10-22T22:00:50.404Z","slug":"CVE-2026-115385","body":"## Overview\n\nWasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASIp3 implementation that allows guests to abort the Unix host process. Guests with mutable preopened directory access can call set-times or set-times-at with negative seconds timestamps before the epoch, triggering an assertion failure that crashes the host.\n\n## Affected\n\n- `wasmtime >= 46.0.0 < 48.0.4`\n- `wasmtime >= 49.0.0 < 49.0.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-115385)\n\nAffected packages:\n\n- `wasmtime-wasi >= 49.0.0, < 49.0.2`\n\nPatched in:\n\n- `wasmtime-wasi 49.0.2`\n\nSource: https://osv.dev/vulnerability/RUSTSEC-2026-0324","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}