CVE-2026-71260ESPHome web_server Plaintext Password Disclosure via JSON "value" Field

Descripción

ESPHome through 2026.7.0-dev discloses plaintext passwords via its web_server component. In WebServer::text_json_ (esphome/components/web_server/web_server.cpp), a text entity configured with mode: password (TEXT_MODE_PASSWORD) has its JSON "state" field correctly masked as "********", but the same serialization path unconditionally writes the raw password into the JSON "value" field via set_json_icon_state_value/set_json_value.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/esphome/esphome third-party-advisory
• https://github.com/esphome/esphome/blob/dev/esphome/components/web_server/web_server.cpp third-party-advisory