Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via try_call

{
  "id": "be331f47075be50ef6d83774a4bde7d28ff130a9086541e0f754d0d226b14ded",
  "url": "https://osv.dev/vulnerability/CVE-2026-115379",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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 garbage collection, leaving stale or dangling references that cause GC heap corruption or incorrect execution.",
    "evidence": "osv:CVE-2026-115379",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-115379",
      "aliases": [
        "CVE-2026-115379",
        "GHSA-hw8m-q44c-ggrf",
        "RUSTSEC-2026-0326"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bytecodealliance/wasmtime",
              "type": "GIT",
              "events": [
                {
                  "introduced": "39d67168cdb6911ffdc961381314b6fed62e3c93"
                },
                {
                  "fixed": "d02ffd202850007ea953224f589a569e8830eb6c"
                },
                {
                  "introduced": "17830bd3c0331d920a8aa38846eebc4d46d98c23"
                },
                {
                  "fixed": "3c8a3e79aa3188a1a12b3aebbaa097abccceac92"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "47.0.0"
                      },
                      {
                        "fixed": "48.0.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "49.0.0"
                      },
                      {
                        "fixed": "49.0.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v49.0.1",
            "v49.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115379.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.948583178Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115379.json",
        "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hw8m-q44c-ggrf",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-115379",
        "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"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-416"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115379.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115379",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521855,
  "published_at": "2026-10-22T19:13:47.737+00:00"
}