{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-56684",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-22T16:39:01.044Z",
        "datePublished": "2026-08-18T14:19:51.047Z",
        "dateUpdated": "2026-08-19T03:56:13.565Z"
    },
    "containers": {
        "cna": {
            "title": "Valkey: TLS pending-data processing use-after-free may allow remote code execution",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-416",
                            "lang": "en",
                            "description": "CWE-416: Use After Free",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/pull/4234",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/pull/4234"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/releases/tag/7.2.14",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/releases/tag/8.0.10",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/releases/tag/8.1.9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/releases/tag/9.0.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5"
                },
                {
                    "name": "https://github.com/valkey-io/valkey/releases/tag/9.1.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1"
                }
            ],
            "affected": [
                {
                    "vendor": "valkey-io",
                    "product": "valkey",
                    "versions": [
                        {
                            "version": "< 7.2.14",
                            "status": "affected"
                        },
                        {
                            "version": ">= 8.0.0, < 8.0.10",
                            "status": "affected"
                        },
                        {
                            "version": ">= 8.1.0, < 8.1.9",
                            "status": "affected"
                        },
                        {
                            "version": ">= 9.0.0, < 9.0.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 9.1.0, < 9.1.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-18T14:19:51.047Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1."
                }
            ],
            "source": {
                "advisory": "GHSA-53mc-f3m3-99vh",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-18T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2026-56684"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-19T03:56:13.565Z"
                }
            }
        ]
    }
}