{"schema":"threatline.record/2","record":{"id":"CVE-2026-115387","aliases":["GHSA-j2g9-4prp-pf6h"],"summary":"Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 Host Panic via WASI Filesystem Timestamp Overflow","details":"Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 contains a denial of service vulnerability in wasmtime-wasi that allows guest WASI programs to panic the host via overflowing filesystem timestamps. Attackers can pass atim or mtim values whose sub-second field overflows the seconds field to path_filestat_set_times, fd_filestat_set_times, set-times, or set-times-at, crashing the host.","categories":["Unclassified"],"product":"wasmtime","vendor":"bytecodealliance","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115387","source_modified_at":"2026-10-22T19:13:53.696Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"wasmtime","vendor":"bytecodealliance","versions":[{"lessThan":"36.0.16","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"36.0.16","versionType":"semver"},{"lessThan":"48.0.3","status":"affected","version":"37.0.0","versionType":"semver"},{"status":"unaffected","version":"48.0.3","versionType":"semver"},{"lessThan":"49.0.1","status":"affected","version":"49.0.0","versionType":"semver"},{"status":"unaffected","version":"49.0.1","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","source_modified_at":"2026-10-23T18:32:55Z","fetched_at":"2026-10-24T20:40:58.529015Z","package":{"ecosystem":"rust","name":"wasmtime-wasi"},"range":"< 36.0.16"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","source_modified_at":"2026-10-23T18:32:55Z","fetched_at":"2026-10-24T20:40:58.529015Z","package":{"ecosystem":"rust","name":"wasmtime-wasi"},"range":" >= 37.0.0,  < 48.0.3"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","source_modified_at":"2026-10-23T18:32:55Z","fetched_at":"2026-10-24T20:40:58.529015Z","package":{"ecosystem":"rust","name":"wasmtime-wasi"},"range":" 49.0.0"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115387","source_modified_at":"2026-10-22T19:13:53.696Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"36.0.16","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115387","source_modified_at":"2026-10-22T19:13:53.696Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"48.0.3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115387","source_modified_at":"2026-10-22T19:13:53.696Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"wasmtime","ecosystem":null},"version":"49.0.1","basis":"first unaffected version stated in the CVE record"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","source_modified_at":"2026-10-23T18:32:55Z","fetched_at":"2026-10-24T20:40:58.529015Z","package":{"ecosystem":"rust","name":"wasmtime-wasi"},"version":"36.0.16"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","source_modified_at":"2026-10-23T18:32:55Z","fetched_at":"2026-10-24T20:40:58.529015Z","package":{"ecosystem":"rust","name":"wasmtime-wasi"},"version":"48.0.3"},{"source":"GitHub Advisory Database","source_url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","source_modified_at":"2026-10-23T18:32:55Z","fetched_at":"2026-10-24T20:40:58.529015Z","package":{"ecosystem":"rust","name":"wasmtime-wasi"},"version":"49.0.1"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00112,"percentile":0.01327,"score_date":"2026-10-23"},"published_at":"2026-10-22T19:13:53.696Z","modified_at":"2026-10-23T18:32:55Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115387","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T19:13:53.696Z"},{"source":"GitHub Advisory Database","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","fetched_at":"2026-10-24T20:40:58.529015Z","source_modified_at":"2026-10-23T18:32:55Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115387","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/wasmtime-before-36.0.16-37.0.0-before-48.0.3-and-49.0.0-before-49.0.1-host-panic-via-wasi-filesystem-timestamp-overflow","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T18:32:55Z","content_hash":"376a1d04001aebab2b409e4f2a70a5d7e5972f92c85281f36f6e1a69c6e77555"}}