What is CVE-2026-51263?

CVE-2026-51263 is a critical-severity vulnerability in N/a, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-07-28.

How severe is CVE-2026-51263?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in N/a

CVE-2026-51263

schreibfaul1 ESP32-audioI2S 3.4.5 is vulnerable to Buffer Overflow. The Audio::openai_speech function in the Audio library manually constructs JSON request bodies and HTTP request headers by directly concatenating externally controllable i…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-51263?: CVE-2026-51263 is a critical-severity vulnerability in N/a, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-07-28.
How severe is CVE-2026-51263?: Critical severity. CVSS v3 base score is 9.8 out of 10.