{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73500",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-12T19:00:33.736Z",
        "datePublished": "2026-08-12T21:22:25.151Z",
        "dateUpdated": "2026-08-13T17:53:16.094Z"
    },
    "containers": {
        "cna": {
            "title": "etcd: `tlsListener.acceptLoop` spawns unbounded handshake goroutines with no deadline",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-770",
                            "lang": "en",
                            "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "vectorString": "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",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/etcd-io/etcd/security/advisories/GHSA-6vch-q96h-7gc3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-6vch-q96h-7gc3"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/pull/22130",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/pull/22130"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/commit/2e07efce9745004eb4773cffaada9b5cdf77cff2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/commit/2e07efce9745004eb4773cffaada9b5cdf77cff2"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/commit/89ff6d50796049d4f1136915ba21504b76e7e372",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/commit/89ff6d50796049d4f1136915ba21504b76e7e372"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/commit/8e4dd0679a2c6b095d2a32a749fda2521c7809a3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/commit/8e4dd0679a2c6b095d2a32a749fda2521c7809a3"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/commit/f73cba7d920019f91a1ea1f6697833e42731f057",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/commit/f73cba7d920019f91a1ea1f6697833e42731f057"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/releases/tag/v3.5.33",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/releases/tag/v3.5.33"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/releases/tag/v3.6.14",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/releases/tag/v3.6.14"
                },
                {
                    "name": "https://github.com/etcd-io/etcd/releases/tag/v3.7.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/etcd-io/etcd/releases/tag/v3.7.1"
                }
            ],
            "affected": [
                {
                    "vendor": "etcd-io",
                    "product": "etcd",
                    "versions": [
                        {
                            "version": "< 3.5.33",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.6.0, < 3.6.14",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.7.0-alpha.0, < 3.7.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-12T21:22:25.151Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a network attacker who can reach an etcd TLS listener can open many TCP connections and never send a ClientHello. In client/pkg/transport/listener_tls.go, each connection handled by tlsListener.acceptLoop spawns a goroutine that blocks indefinitely inside tls.Conn.Handshake() and remains tracked in the pending map. Unbounded goroutine and map growth can exhaust memory in the etcd process, causing loss of availability for the cluster and, when etcd backs Kubernetes, the control plane. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1."
                }
            ],
            "source": {
                "advisory": "GHSA-6vch-q96h-7gc3",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-13T17:49:14.567913Z",
                                "id": "CVE-2026-73500",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-13T17:53:16.094Z"
                }
            }
        ]
    }
}