Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 Fuel Accounting Bypass DoS

{
  "id": "68cfcbf8791615122955731a3e5f8a9c3ca7753e64849cdc5e8baa9450777eaf",
  "url": "https://osv.dev/vulnerability/CVE-2026-115390",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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 fuel, evading timeouts and periodic yields for denial of service.",
    "evidence": "osv:CVE-2026-115390",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-115390",
      "aliases": [
        "CVE-2026-115390",
        "GHSA-m63x-6p34-q65x",
        "RUSTSEC-2026-0315"
      ],
      "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": "ebf20ab7cbf35fa3fbd8202562017fda6a541021"
                },
                {
                  "introduced": "17830bd3c0331d920a8aa38846eebc4d46d98c23"
                },
                {
                  "fixed": "46c23a87dac1465986a8ad53ba6a7ae49372857b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "47.0.0"
                      },
                      {
                        "fixed": "48.0.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "49.0.0"
                      },
                      {
                        "fixed": "49.0.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v49.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115390.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.577955022Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115390.json",
        "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m63x-6p34-q65x",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-115390",
        "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"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-400"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115390.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115390",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492188,
  "published_at": "2026-10-22T19:13:55.91+00:00"
}