CVE-2026-62966

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to version 3.11.2, the multipart parser in src/WebRequest.cpp frees itemBuffer and sets it to NULL when BOUNDARYORDATA matches the closing boundary of a file part, before confirming...

CVE-2026-62966

The ESPAsyncWebServer library (for ESP32, ESP8266, RP2040, and RP2350) contains a null pointer write vulnerability in the multipart parser within src/WebRequest.cpp prior to version 3.11.2 . The flaw occurs because _itemBuffer is freed and set to NULL when a file part boundary is matched, but _it...

CVE-2026-62966: ESP32Async ESPAsyncWebServer: ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to version 3.11.2, the multipart parser in src/WebRequest.cpp frees itemBuffer and sets it to NULL when BOUNDARYORDATA matches the closing boundary of a file part, before confirming...

CVE-2026-54571

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to 3.11.1, the multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value while parseMultipartPostByte processes the boundary. A remote request...

CVE-2026-54571

ESPAsyncWebServer (an asynchronous HTTP/WebSocket server library for ESP32, ESP8266, RP2040, and RP2350) contains an integer overflow in its multipart/form-data parser (src/WebRequest.cpp). Prior to version 3.11.1, the _boundaryPosition variable is stored as an 8-bit value ; a remote request with...

EUVD-2026-82385

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to 3.11.1, the multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value while parseMultipartPostByte processes the boundary. A remote request...

CVE-2026-54571 ESPAsyncWebServer: Integer overflow in multipart boundary parser causes denial of service

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to 3.11.1, the multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value while parseMultipartPostByte processes the boundary. A remote request...

CVE-2026-54571 ESPAsyncWebServer: Integer overflow in multipart boundary parser causes denial of service

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to 3.11.1, the multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value while parseMultipartPostByte processes the boundary. A remote request...

CVE-2026-54571 ESPAsyncWebServer: Integer overflow in multipart boundary parser causes denial of service

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to 3.11.1, the multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value while parseMultipartPostByte processes the boundary. A remote request...

CVE-2026-54571: Integer Overflow or Wraparound

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. Prior to 3.11.1, the multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value while parseMultipartPostByte processes the boundary. A remote request...

PT-2026-95066

Name of the Vulnerable Software and Affected Versions ESPAsyncWebServer versions prior to 3.11.1 Description The multipart/form-data parser in src/WebRequest.cpp stores boundaryPosition as an 8-bit value during the processing of the boundary by the parseMultipartPostByte function. A remote reques...

EUVD-2025-19427

Malicious code in bioql PyPI...

CVE-2025-53094

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. In versions up to and including 3.7.8, a CRLF Carriage Return Line Feed injection vulnerability exists in the construction and output of HTTP headers within AsyncWebHeader.cpp. Unsanitize...

CVE-2025-53094

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. In versions up to and including 3.7.8, a CRLF Carriage Return Line Feed injection vulnerability exists in the construction and output of HTTP headers within AsyncWebHeader.cpp. Unsanitize...

CVE-2025-53094 ESPAsyncWebServer Vulnerable to CRLF Injection in AsyncWebHeader.cpp

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. In versions up to and including 3.7.8, a CRLF Carriage Return Line Feed injection vulnerability exists in the construction and output of HTTP headers within AsyncWebHeader.cpp. Unsanitize...

CVE-2025-53094

ESPAsyncWebServer (ESP32/ESP8266/RP2040/ RP2350) up to version 3.7.8 contains a CRLF injection vulnerability in AsyncWebHeader.cpp that can corrupt header names/values and potentially manipulate HTTP responses. Root cause: unsanitized CRLF input during header construction/output. Impact: header/r...

CVE-2025-53094 ESPAsyncWebServer Vulnerable to CRLF Injection in AsyncWebHeader.cpp

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. In versions up to and including 3.7.8, a CRLF Carriage Return Line Feed injection vulnerability exists in the construction and output of HTTP headers within AsyncWebHeader.cpp. Unsanitize...

CVE-2025-53094

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. In versions up to and including 3.7.8, a CRLF Carriage Return Line Feed injection vulnerability exists in the construction and output of HTTP headers within "AsyncWebHeader.cpp"...

PT-2025-27254 · Unknown · Espasyncwebserver

Name of the Vulnerable Software and Affected Versions: ESPAsyncWebServer versions up to and including 3.7.8 Description: A CRLF injection vulnerability exists in the construction and output of HTTP headers within AsyncWebHeader.cpp. Unsanitized input allows attackers to inject CR r or LF characte...

PT-2025-51491

Уязвимость асинхронного веб-сервераESPAsyncWebServer связанная с непринятием мер по нейтрализации CRLF-последовательностей. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, обойти существующие ограничения безопасности...