Medium severity · published Aug 5, 2026
CVE-2026-71260
ESPHome web_server Plaintext Password Disclosure via JSON "value" Field
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
esphome · esphome
through 2026.7.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71260
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-71260
github.com
https://github.com/esphome/esphome
github.com
https://github.com/esphome/esphome/blob/dev/esphome/components/web_server/web_server.cpp
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