PyPI/esphome CVE-2026-23833: medium, EPSS 0.30%

ESPHome vulnerable to denial-of-service via out-of-bounds check bypass in the API component

Action: Upgrade esphome to 2025.12.7 or later.

pip install esphome==2025.12.7

Affected

Fixed versions

Sources

• osv: GHSA-4h3h-63v6-88qx
• https://github.com/esphome/esphome/security/advisories/GHSA-4h3h-63v6-88qx
• https://nvd.nist.gov/vuln/detail/CVE-2026-23833
• https://github.com/esphome/esphome/pull/13306
• https://github.com/esphome/esphome/commit/69d7b6e9210390051318bd8e6410727689de08d6
• https://esphome.io/guides/security_best_practices
• https://github.com/esphome/esphome

CVE-2026-23833 · published 2026-01-21T01:02:49Z · modified 2026-07-07T17:56:35.058004084Z · JSON