{"id":"CVE-2026-115390","title":"Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 Fuel Accounting Bypass DoS","summary":"Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 contains a fuel accounting flaw in Cranelift-compiled call_ref and try_table catch paths. Malicious guests can reset consumed fuel after calls to run exponentially long on linear fue…","severity":"medium","cvss":5.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-400"],"vendor":"bytecodealliance","product":"wasmtime","affected":["wasmtime >= 47.0.0 < 48.0.3","wasmtime >= 49.0.0 < 49.0.1"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:13:55.910Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115390","references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m63x-6p34-q65x","label":"GitHub Security Advisory (GHSA-m63x-6p34-q65x)"},{"url":"https://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.3-and-49.0.0-before-49.0.1-fuel-accounting-bypass-dos","label":"VulnCheck Advisory: Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 Fuel Accounting Bypass DoS"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.405Z","slug":"CVE-2026-115390","body":"## Overview\n\nWasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 contains a fuel accounting flaw in Cranelift-compiled call_ref and try_table catch paths. Malicious guests can reset consumed fuel after calls to run exponentially long on linear fuel, evading timeouts and periodic yields for denial of service.\n\n## Affected\n\n- `wasmtime >= 47.0.0 < 48.0.3`\n- `wasmtime >= 49.0.0 < 49.0.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":31.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}