{"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": "2026-06-10T00:25:59.233Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-45541", "lastModified": "2026-06-10T02:16:32.960", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-06-10T02:16:32.960", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/commit/00a2f7fbbbd8fe6d04729022e1d5c9a49435bfe8"}, {"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/commit/0dc4ee7537f3b12350f5966cecacd59bba840ec6"}, {"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/commit/37508ab91124ef426a7396d30f79eba1162700c7"}, {"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/commit/9fc0ca13b3b85b98d32b98cd9dc8ff9d82642b7b"}, {"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/commit/dc46dc51359749e50617eb70d6f9ae298adc4fff"}, {"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/commit/f88a47e4f37fb11ae4b0908cd5c80059d83198c6"}, {"source": "security-advisories@github.com", "url": "https://github.com/espressif/esp-idf/security/advisories/GHSA-3j8v-xgrq-5vg8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}