{"id":"CVE-2025-57808","aliases":["GHSA-mxh2-ccgj-8635","PYSEC-2026-1330"],"url":"https://o3.security/vulnerability/CVE-2025-57808","summary":"ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header","details":"ESPHome is a system to control microcontrollers remotely through Home Automation systems. In version 2025.8.0 in the ESP-IDF platform, ESPHome's web_server authentication check can pass incorrectly when the client-supplied base64-encoded Authorization value is empty or is a substring of the correct value. This allows access to web_server functionality (including OTA, if enabled) without knowing any information about the correct username or password. This issue has been patched in version 2025.8.1.","published":"2025-09-02T00:26:09.017Z","modified":"2026-07-15T01:48:54.584043098Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"esphome","fixedVersion":"2025.8.1"}],"fix":{"url":"https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5","label":"esphome/esphome@2aceb56"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/57xxx/CVE-2025-57808.json"},{"type":"ADVISORY","url":"https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-57808"},{"type":"FIX","url":"https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:54.584043098Z"}}