CVE-2026-51267
The vulnerability is a heap-based buffer overflow in the ESP32-audioI2S 3.4.5 library, caused by unsafe URL path concatenation and encoding. Attackers can send a crafted URL that overflows a heap buffer, potentially leading to code execution or a crash. The flaw is critical because it requires no authentication or user interaction.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
schreibfaul1 ESP32-audioI2S 3.4.5
Real-world impact
A remote attacker can send a malicious URL to trigger the overflow, which may allow them to run arbitrary code, steal data, crash the device, or elevate privileges on the affected system.
Why this severity
The CVSS score of 9.8 reflects that the flaw is exploitable over the network, requires no user interaction, and can compromise confidentiality, integrity, and availability. The lack of authentication and the high impact of the vulnerability make it a critical risk.
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources