What is CVE-2026-71260?

CVE-2026-71260 is a medium-severity vulnerability in Esphome, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2026-08-05.

How severe is CVE-2026-71260?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Esphome

CVE-2026-71260

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.

EPSS: 0.002 (14.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Esphome — versions 0

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)

Frequently asked questions

What is CVE-2026-71260?: CVE-2026-71260 is a medium-severity vulnerability in Esphome, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2026-08-05.
How severe is CVE-2026-71260?: Medium severity. CVSS v3 base score is 6.5 out of 10.