Vulnerability record

CVE-2026-51269

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Full record read. Reported values and explicit gaps below come from the tracked record. Tracker snapshot: Aug 8, 2026.

What it is

Reported

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. Source description excerpt; complete tracked detail loads below.

NVD published: Jul 28, 2026 · Source record updated: Aug 1, 2026 · Tracker snapshot: Aug 8, 2026

What is affected

Reported

schreibfaul1 — ESP32-audioI2S. Product-level identification only; no affected-version conclusion is available from this field.

NVD published: Jul 28, 2026 · Source record updated: Aug 1, 2026 · Tracker snapshot: Aug 8, 2026

Urgency and basis

Reported

Track* · 233.4

Tracker decision tier from the evidence detailed below · Source record updated: Aug 1, 2026 · Tracker snapshot: Aug 8, 2026

Exploitation evidence

Not reported

Not reported by tracked sources.

What to do

Reported

A source remediation link is available. Validate that guidance against the affected product and your environment.

Source remediation ↗

Tracked source remediation field · Source record updated: Aug 1, 2026 · Tracker snapshot: Aug 8, 2026

Evidence detail

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