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RUSTSEC-2026-0037 (CVE-2026-31812)

Vulnerability from osv_rustsec – Published: 2026-03-09 12:00 – Updated: 2026-03-14 07:21 – Source website
VLAI
Summary
Denial of service in Quinn endpoints
Details

Receiving QUIC transport parameters containing invalid values could lead to a panic.

Unfortunately the maintainers did not properly assess usage of unwrap() calls in the transport parameters parsing code, and we did not have sufficient fuzzing coverage to find this issue. We have since added a fuzzing target to cover this code path.

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "quinn-proto",
        "purl": "pkg:cargo/quinn-proto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.5.0"
            },
            {
              "fixed": "0.11.14"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2026-31812",
    "GHSA-6xvm-j4wr-6v98"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Receiving QUIC transport parameters containing invalid values could lead to a panic.\n\nUnfortunately the maintainers did not properly assess usage of `unwrap()` calls in the\ntransport parameters parsing code, and we did not have sufficient fuzzing coverage to find this\nissue. We have since added a fuzzing target to cover this code path.",
  "id": "RUSTSEC-2026-0037",
  "modified": "2026-03-14T07:21:57Z",
  "published": "2026-03-09T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/quinn-proto"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0037.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/quinn-rs/quinn/pull/2559"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Denial of service in Quinn endpoints"
}



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