CVE-2026-51268

✕ Withdrawn — historical dataCRITICALPre-NVD 9.8
9.8CVSS
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the host parsing logic. The dismantle_host() function parses untrusted host and URL input, and subsequent code uses clone_from() to copy parsed host, request host, extension and query_string segments into fixed heap buffers without boundary checking.

CVSS v3
9.8
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
—
EG Risk
—
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

ESP32-audioI2S/src/Audio.cpp at master · schreibfaul1/ESP32-audioI2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp
generic

cveadvisory-/CVE-2026-51268 at main · programmervuln/cveadvisory- · GitHub

https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51268

Vendor Advisories for CVE-2026-51268(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 10× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-29 23:38 UTCGHSA enrichment
  2. 2026-08-25 23:28 UTCGHSA enrichment
  3. 2026-08-22 19:42 UTCGHSA enrichment
  4. 2026-08-19 16:00 UTCGHSA enrichment
  5. 2026-08-16 12:07 UTCGHSA enrichment
  6. 2026-08-13 08:25 UTCGHSA enrichment
  7. 2026-08-10 04:44 UTCGHSA enrichment
  8. 2026-08-07 01:02 UTCGHSA enrichment
  9. 2026-08-03 21:21 UTCGHSA enrichment
  10. 2026-08-01 04:16 UTCEPSS rescore
  11. 2026-07-31 17:39 UTCEG score recompute▼ 9.80
  12. 2026-07-31 17:39 UTCGHSA enrichment
  13. 2026-07-31 14:00 UTCGHSA enrichment
  14. 2026-07-31 10:20 UTCGHSA enrichment
  15. 2026-07-31 06:41 UTCGHSA enrichment
  16. 2026-07-31 03:03 UTCGHSA enrichment
  17. 2026-07-30 23:24 UTCEG score recompute
  18. 2026-07-30 23:24 UTCGHSA enrichment
  19. 2026-07-30 19:45 UTCGHSA enrichment
  20. 2026-07-30 18:00 UTCEG score recompute▲ 9.80
  21. 2026-07-30 17:59 UTCGHSA enrichment
  22. 2026-07-30 17:56 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  23. 2026-07-30 16:28 UTCEPSS rescore
  24. 2026-07-30 01:30 UTCEPSS rescore
  25. 2026-07-28 16:19 UTCNVD update
Show 2 more
  1. 2026-07-28 15:30 UTCEG score recompute
  2. 2026-07-28 15:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51268?
CVE-2026-51268 is a critical vulnerability published on July 28, 2026. schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the host parsing logic. The dismantlehost() function parses untrusted host and URL input, and subsequent code uses clonefrom() to copy parsed host, request host, extension and query_string segments into fixed heap…
When was CVE-2026-51268 disclosed?
CVE-2026-51268 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51268 actively exploited?
CVE-2026-51268 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.4% of all scored CVEs.
What is the CVSS score of CVE-2026-51268?
CVE-2026-51268 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51268?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51268, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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