{"id":"CVE-2026-71260","aliases":["EUVD-2026-53345","GHSA-qmjj-2rwx-5ffc"],"status":"published","title":"ESPHome web_server Plaintext Password Disclosure via JSON \"value\" Field","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00275,"percentile":0.19983,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-522"],"published":"2026-08-05T12:26:08Z","modified":"2026-10-28T02:31:12Z","products":[{"vendor":"esphome","product":"esphome"}],"references":[{"url":"https://github.com/esphome/esphome","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/esphome/esphome/blob/dev/esphome/components/web_server/web_server.cpp","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71260","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qmjj-2rwx-5ffc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71260.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-71260","title":"ESPHome web_server Plaintext Password Disclosure via JSON \"value\" Field","description":"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.","status":"published","published":"2026-08-05T12:26:08.759Z","modified":"2026-08-10T11:46:22.212Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:19:49.199185Z"}],"euvd":[{"id":"EUVD-2026-53345","description":"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.","status":"published","published":"2026-08-05T12:26:08Z","modified":"2026-08-10T11:46:22Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:02:05.732685Z"}],"ghsa":[{"id":"GHSA-qmjj-2rwx-5ffc","title":"ESPHome through 2026.7.0-dev discloses plaintext passwords via its web_server component. In...","description":"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(). Because web_server listens on port 80 with no authentication by default, any attacker on the local network can retrieve the plaintext password (e.g. WiFi credentials, API tokens) via GET /text/\u003centity_id\u003e or the /events EventSource stream.","status":"published","published":"2026-08-05T15:32:19Z","modified":"2026-08-05T15:32:23Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T15:10:07.328501Z"}],"nvd":[{"id":"CVE-2026-71260","description":"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.","status":"published","published":"2026-08-05T13:24:50.117Z","modified":"2026-08-26T17:13:24.8Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:12:35.031043Z"}],"osv":[{"id":"CVE-2026-71260","title":"ESPHome web_server Plaintext Password Disclosure via JSON \"value\" Field","description":"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.","status":"published","published":"2026-08-05T12:26:08.759Z","modified":"2026-10-28T02:31:12.543154113Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T15:45:15.164658Z"}]}}