CVE-2026-45541
Last modified
CVE-2026-45541 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
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. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Espressif | Esp-Idf | 5.2.6 |
| Espressif | Esp-Idf | 5.3.5 |
| Espressif | Esp-Idf | 5.4.4 |
| Espressif | Esp-Idf | 5.5.4 |
| Espressif | Esp-Idf | 6.0 |
References
- https://github.com/espressif/esp-idf/security/advisories/GHSA-3j8v-xgrq-5vg8Mitigation, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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