CVE-2026-45541
June 11, 2026, 6:05 p.m.
7.5
High
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.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Espressif |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-476
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | espressif | esp-idf | 5.2.6 | / | / | / | / | / | / | / |
| a | espressif | esp-idf | 5.3.5 | / | / | / | / | / | / | / |
| a | espressif | esp-idf | 5.4.4 | / | / | / | / | / | / | / |
| a | espressif | esp-idf | 5.5.4 | / | / | / | / | / | / | / |
| a | espressif | esp-idf | 6.0 | / | / | / | / | / | / | / |
References
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: NETWORK
- Attack Complexity: LOW
- Privileges Required: NONE
- Scope: UNCHANGED
- Confidentiality Impact: NONE
- Integrity Impact: NONE
- Availability Impact: HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Timeline
Published: June 10, 2026, 2:16 a.m.
Last Modified: June 11, 2026, 6:05 p.m.
Last Modified: June 11, 2026, 6:05 p.m.
Status : Analyzed
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.