PYSEC-2026-1326 ESPHome vulnerable to denial-of-service via out-of-bounds check bypass in the API component

Summary An integer overflow in the API component's protobuf decoder allows denial-of-service attacks when API encryption is not used. Details The bounds check ptr + fieldlength end in components/api/proto.cpp can overflow when a malicious client sends a large fieldlength value. This affects all...

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

SummaryAn integer overflow in the API component's protobuf decoder allows denial-of-service attacks when API encryption is not used. DetailsThe bounds check ptr + fieldlength end in components/api/proto.cpp can overflow when a malicious client sends a large fieldlength value. This affects all...

EUVD-2026-3306

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

Linux Distros Unpatched Vulnerability : CVE-2015-5237

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - protobuf allows remote authenticated attackers to cause a heap-based buffer overflow. CVE-2015-5237 Note that Nessus relies on the presence of the package as...