{"@context":"https://openvex.dev/ns/v0.2.0","@id":"https://database.harborguard.co/cve/CVE-2026-45541/vex.json","author":"HarborGuard Database","role":"Document Creator","timestamp":"2026-06-10T14:40:16.880Z","version":1,"tooling":"HarborGuard Database (https://database.harborguard.co)","statements":[{"vulnerability":{"name":"CVE-2026-45541","@id":"https://www.cve.org/CVERecord?id=CVE-2026-45541","description":"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."},"products":[{"@id":"cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*","identifiers":{"cpe23":"cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*"}}],"status":"affected","action_statement":"No fixed version is published yet; monitor the upstream advisory.","timestamp":"2026-06-10T14:40:16.880Z"}]}