{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-44726",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-07T18:04:17.308Z",
        "datePublished": "2026-06-23T17:24:02.702Z",
        "dateUpdated": "2026-06-25T13:48:50.170Z"
    },
    "containers": {
        "cna": {
            "title": "Deno: TLS retry copies stale upgrade hook, risking plaintext traffic",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-319",
                            "lang": "en",
                            "description": "CWE-319: Cleartext Transmission of Sensitive Information",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/denoland/deno/security/advisories/GHSA-chqv-56wv-7564",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/denoland/deno/security/advisories/GHSA-chqv-56wv-7564"
                }
            ],
            "affected": [
                {
                    "vendor": "denoland",
                    "product": "deno",
                    "versions": [
                        {
                            "version": ">= 2.0.0, < 2.7.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-23T17:24:02.702Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Deno is a JavaScript, TypeScript, and WebAssembly runtime. From 2.0.0 until 2.7.8, a flaw in Deno's Node.js tls compatibility layer could cause a TLS client to transmit application data in plaintext after a connection retry. When `autoSelectFamily was enabled and the first address-family attempt failed, the socket reinitialization path reused a stale TLS upgrade hook that was bound to the original, failed handle. As a result, the replacement TCP connection was never upgraded to TLS, and any data the application wrote before the secureConnect event travelled over the network unencrypted. A network attacker positioned to cause the initial connection attempt to fail (for example, by dropping IPv6 traffic on a dual-stack host) could deterministically trigger the fallback path and observe or tamper with traffic that the application believed was TLS-protected. This vulnerability is fixed in 2.7.8."
                }
            ],
            "source": {
                "advisory": "GHSA-chqv-56wv-7564",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-25T03:55:51.795074Z",
                                "id": "CVE-2026-44726",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-25T13:48:50.170Z"
                }
            }
        ]
    }
}