GHSA-F9QC-QG88-7PQ5 Buffa Vulnerable to Memory Exhaustion Denial of Service in decode_unknown_field via Unbounded Allocation

The decodeunknownfield function in buffa's protobuf decoder allocated heap memory in proportion to untrusted input unknown fields in the serialized protobuf without enforcing an allocation budget. Any message decoded from untrusted input using code generated with preserveunknownfields=true the...

Buffa Vulnerable to Memory Exhaustion Denial of Service in decode_unknown_field via Unbounded Allocation

The decodeunknownfield function in buffa's protobuf decoder allocated heap memory in proportion to untrusted input unknown fields in the serialized protobuf without enforcing an allocation budget. Any message decoded from untrusted input using code generated with preserveunknownfields=true the...

Protobuf: Unbounded recursion depth in embedded-message decoding

Summary Unbounded recursion depth in Protobuf.Decoder Hex package protobuf, versions = 0.8.0, 0.16.1 lets an unauthenticated attacker crash any service that decodes untrusted protobuf messages whose schema contains a self-referential or cyclic message type. A small request body a few KB to a few ...

PT-2026-60375

Name of the Vulnerable Software and Affected Versions Elixir protobuf versions 0.8.0 through 0.16.0 Description Services using Protobuf.Decoder to decode attacker-controlled bytes can be taken offline if the schema contains a self-referential or cyclic message type. The Protobuf.Decoder.value for...

PT-2026-54519

Name of the Vulnerable Software and Affected Versions buffa affected versions not specified Description The buffa protobuf decoder contains a memory-amplification issue. A malformed message can cause the library to consume up to 22 times the expected amount of RAM, leading to a denial of service...

Denial Of Service (DoS)

esphome is vulnerable to Denial of Service DoS. The vulnerability is due to an integer overflow in the API component's protobuf decoder during bounds checking, which allows an attacker to bypass memory validation and trigger a denial-of-service by causing the device to read invalid memory and cra...

Denial-Of-Service (DoS)

ESPHome is vulnerable to a Denial-Of-Service DoS. The vulnerability is due to an integer overflow in the API protobuf decoder, where an attacker-controlled fieldlength value can overflow the bounds check in proto.cpp, bypassing validation and causing invalid memory access that crashes the device,...

GHSA-4H3H-63V6-88QX 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...

CVE-2026-23833

A flaw was found in ESPHome. An integer overflow vulnerability exists in the API component's protobuf decoder. A remote attacker can exploit this by sending a specially crafted, large fieldlength value, which bypasses a bounds check. This can lead to a denial-of-service DoS condition, causing the...

CVE-2026-23833

ESPHome is a system to control microcontrollers remotely through Home Automation systems. In versions 2025.9.0 through 2025.12.6, an integer overflow in the API component's protobuf decoder allows denial-of-service attacks when API encryption is not used. The bounds check ptr + fieldlength end in...

CVE-2026-23833 ESPHome vulnerable to denial-of-service via out-of-bounds check bypass in the API component

ESPHome is a system to control microcontrollers remotely through Home Automation systems. In versions 2025.9.0 through 2025.12.6, an integer overflow in the API component's protobuf decoder allows denial-of-service attacks when API encryption is not used. The bounds check ptr + fieldlength end in...

CVE-2026-23833

Summary: CVE-2026-23833 affects ESPHome 2025.9.0–2025.12.6. A flaw in the API component’s protobuf decoder lets an attacker perform a denial-of-service by sending a large field_length, causing an overflow of the bounds check in components/api/proto.cpp (ptr + field_length > end). This can cras...

CVE-2026-23833: Integer Overflow or Wraparound

ESPHome is a system to control microcontrollers remotely through Home Automation systems. In versions 2025.9.0 through 2025.12.6, an integer overflow in the API component's protobuf decoder allows denial-of-service attacks when API encryption is not used. The bounds check ptr + fieldlength end in...

ESPHome Input Validation Vulnerability

ESPHome is an open-source system for configuring and managing smart hardware. It is used to control Esp8266/Esp32 hardware, enabling home automation control. The version 2025.9.0 to 2025.12.6 of ESPHome contains a vulnerability related to input validation errors. This vulnerability stems from...

PT-2026-3475

Name of the Vulnerable Software and Affected Versions ESPHome versions 2025.9.0 through 2025.12.6 Description ESPHome is a system for remote microcontroller control via Home Automation systems. An integer overflow in the API component’s protobuf decoder can lead to denial-of-service attacks when...