CVE-2026-71260 — MEDIUM (6.5)

Vulnerability 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/<entity_id> or the /events EventSource stream.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-522

References

FAQ

What is CVE-2026-71260?

CVE-2026-71260 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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: ...

How severe is CVE-2026-71260?

CVE-2026-71260 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-71260?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.