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    RUSTSEC-2026-0327 (GHSA-32H6-97MM-8Q3C)

    Vulnerability from osv_rustsec – Published: 2026-10-02 12:00 – Updated: 2026-10-02 20:27 – Source website
    VLAI
    Summary
    Wasmtime component async-lifted callback result count is unvalidated, causing a native stack buffer overflow
    Details

    This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c For more information see the GitHub-hosted security advisory.


    {
      "affected": [
        {
          "database_specific": {
            "categories": [],
            "cvss": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H",
            "informational": null
          },
          "ecosystem_specific": {
            "affected_functions": null,
            "affects": {
              "arch": [],
              "functions": [],
              "os": []
            }
          },
          "package": {
            "ecosystem": "crates.io",
            "name": "wasmtime",
            "purl": "pkg:cargo/wasmtime"
          },
          "ranges": [
            {
              "events": [
                {
                  "introduced": "39.0.0"
                },
                {
                  "fixed": "48.0.4"
                },
                {
                  "introduced": "49.0.0"
                },
                {
                  "fixed": "49.0.2"
                }
              ],
              "type": "SEMVER"
            }
          ],
          "versions": []
        }
      ],
      "aliases": [
        "GHSA-32h6-97mm-8q3c"
      ],
      "database_specific": {
        "license": "CC0-1.0"
      },
      "details": "This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c\nFor more information see the GitHub-hosted security advisory.",
      "id": "RUSTSEC-2026-0327",
      "modified": "2026-10-02T20:27:46Z",
      "published": "2026-10-02T12:00:00Z",
      "references": [
        {
          "type": "PACKAGE",
          "url": "https://crates.io/crates/wasmtime"
        },
        {
          "type": "ADVISORY",
          "url": "https://rustsec.org/advisories/RUSTSEC-2026-0327.html"
        },
        {
          "type": "WEB",
          "url": "https://github.com/bytecodealliance/wasmtime/pull/14471"
        }
      ],
      "related": [],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H",
          "type": "CVSS_V4"
        }
      ],
      "summary": "Wasmtime component async-lifted callback result count is unvalidated, causing a native stack buffer overflow"
    }