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...

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 (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...

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...

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 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: Improper Neutralization of CRLF Sequences

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...

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...