{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4438384b247e5cf8615892cfe1ac1c4dc75a2119"
            }
          ],
          "repo": "https://github.com/aws/s2n-quic",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9q54-f358-3fqf"
  ],
  "database_specific": {
    "cna_assigner": "AMZN",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10740.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "1.8.1"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "last_affected": "1.8.1"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "s2n-quic"
          },
          {
            "fixed": "1.8.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets.\n\n\n\nTo remediate this issue, users should upgrade to v1.8.2.",
  "id": "CVE-2026-10740",
  "modified": "2026-07-08T05:39:21.772194246Z",
  "published": "2026-06-10T18:09:36.070Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://aws.amazon.com/security/security-bulletins/2026-042-aws/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10740.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/aws/s2n-quic/security/advisories/GHSA-9q54-f358-3fqf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10740"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aws/s2n-quic/releases/tag/v1.82.0"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Excessive memory allocation in s2n-quic"
}