{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-45541",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-12T17:48:47.878Z",
        "datePublished": "2026-06-10T00:25:59.233Z",
        "dateUpdated": "2026-06-10T14:40:16.880Z"
    },
    "containers": {
        "cna": {
            "title": "ESF-IDF: Remote Null Pointer Dereference in WebSocket Server",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-476",
                            "lang": "en",
                            "description": "CWE-476: NULL Pointer Dereference",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/espressif/esp-idf/security/advisories/GHSA-3j8v-xgrq-5vg8",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/espressif/esp-idf/security/advisories/GHSA-3j8v-xgrq-5vg8"
                },
                {
                    "name": "https://github.com/espressif/esp-idf/commit/00a2f7fbbbd8fe6d04729022e1d5c9a49435bfe8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/espressif/esp-idf/commit/00a2f7fbbbd8fe6d04729022e1d5c9a49435bfe8"
                },
                {
                    "name": "https://github.com/espressif/esp-idf/commit/0dc4ee7537f3b12350f5966cecacd59bba840ec6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/espressif/esp-idf/commit/0dc4ee7537f3b12350f5966cecacd59bba840ec6"
                },
                {
                    "name": "https://github.com/espressif/esp-idf/commit/37508ab91124ef426a7396d30f79eba1162700c7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/espressif/esp-idf/commit/37508ab91124ef426a7396d30f79eba1162700c7"
                },
                {
                    "name": "https://github.com/espressif/esp-idf/commit/9fc0ca13b3b85b98d32b98cd9dc8ff9d82642b7b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/espressif/esp-idf/commit/9fc0ca13b3b85b98d32b98cd9dc8ff9d82642b7b"
                },
                {
                    "name": "https://github.com/espressif/esp-idf/commit/dc46dc51359749e50617eb70d6f9ae298adc4fff",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/espressif/esp-idf/commit/dc46dc51359749e50617eb70d6f9ae298adc4fff"
                },
                {
                    "name": "https://github.com/espressif/esp-idf/commit/f88a47e4f37fb11ae4b0908cd5c80059d83198c6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/espressif/esp-idf/commit/f88a47e4f37fb11ae4b0908cd5c80059d83198c6"
                }
            ],
            "affected": [
                {
                    "vendor": "espressif",
                    "product": "esp-idf",
                    "versions": [
                        {
                            "version": "= 6.0",
                            "status": "affected"
                        },
                        {
                            "version": "= 5.5.4",
                            "status": "affected"
                        },
                        {
                            "version": "= 5.4.4",
                            "status": "affected"
                        },
                        {
                            "version": "= 5.3.5",
                            "status": "affected"
                        },
                        {
                            "version": "= 5.2.6",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-10T00:25:59.233Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a NULL-pointer dereference exists in the WebSocket subprotocol-negotiation path of the esp_http_server component. While parsing the client-supplied Sec-WebSocket-Protocol request header during the WebSocket handshake, the tokenisation result is dereferenced without a NULL check, so a malformed header value can crash the server before any application-level authentication runs. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1."
                }
            ],
            "source": {
                "advisory": "GHSA-3j8v-xgrq-5vg8",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-10T14:40:06.288007Z",
                                "id": "CVE-2026-45541",
                                "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": "2026-06-10T14:40:16.880Z"
                }
            }
        ]
    }
}