{"id":"CVE-2026-115379","title":"Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via try_call","summary":"Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a missing GC rooting vulnerability that leaves references live across try_call unrooted when compiling Wasm modules. Attackers can supply Wasm modules whose callee triggers …","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-416"],"vendor":"bytecodealliance","product":"wasmtime","affected":["wasmtime >= 47.0.0 < 48.0.4","wasmtime >= 49.0.0 < 49.0.2"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:13:47.737Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115379","references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hw8m-q44c-ggrf","label":"GitHub Security Advisory (GHSA-hw8m-q44c-ggrf)"},{"url":"https://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.4-and-49.0.0-before-49.0.2-gc-heap-corruption-via-try-call","label":"VulnCheck Advisory: Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via try_call"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.403Z","slug":"CVE-2026-115379","body":"## Overview\n\nWasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a missing GC rooting vulnerability that leaves references live across try_call unrooted when compiling Wasm modules. Attackers can supply Wasm modules whose callee triggers garbage collection, leaving stale or dangling references that cause GC heap corruption or incorrect execution.\n\n## Affected\n\n- `wasmtime >= 47.0.0 < 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.","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":31.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}