CVE-2026-51266

✕ Withdrawn — historical dataCRITICALPre-NVD 9.8
9.8CVSS

schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the HTTP request header construction logic. The application dynamically splices attacker-controlled host name, path, query string, and multiple HTTP header fields into a fixed ps_ptr heap buffer without proper size limitation and boundary validation. Remote attackers can use an oversized crafted network request parameter to trigger out-of-bounds heap write, leading to arbitrary code execution.

CVSS v3
9.8
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EPSS PROB
—
EPSS %ILE
—
KEV
—Not applicable: this CVE ID was withdrawn

Published

July 28, 2026

Last Modified

July 28, 2026

References (2)

Frequently asked(4)

What is CVE-2026-51266?
CVE-2026-51266 is a rejected CVE ID: its record was withdrawn on July 31, 2026 and no longer describes a vulnerability. Reason given: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none.
When was the CVE record for CVE-2026-51266 published?
The CVE record for CVE-2026-51266 was published on July 28, 2026. EchelonGraph's copy of the record carries a last-modified date of July 28, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-51266?
CVE-2026-51266 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51266?
There is nothing to remediate under CVE-2026-51266: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability.