CVE-2026-51263

Summary

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 input and instructions strings without effective length restriction and boundary validation. An unauthenticated remote attacker can send oversized malicious string data to trigger a heap buffer overflow during string splicing, resulting in memory corruption.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: total

Additional References

• https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51263

References

• https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp
• https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51263

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