PT-2026-65510 · Undefined · Undefined

CVE-2026-51269 · Published 2026-07-28 · Updated 2026-07-28

NVD

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the connecttospeech() function. The application accepts attacker-controlled long speech text input, performs URL encoding, and directly appends the encoded result into a fixed ps ptr heap buffer when constructing HTTP TTS request headers. Lack of input length validation and boundary checking allows remote attackers to craft oversized input to trigger out-of-bounds heap write, resulting in arbitrary code execution.

Exploit

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-51269

Affected Products

Undefined

References · 3

• 🔥 https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51269 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-51269 · Security Note
• https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp · Note