Feed/CVE-2026-3549
CVE-2026-3549CRITICALCVSS 9.8

CVE-2026-3549

Published Mar 19, 2026·Updated Jun 17, 2026

NVD Description

Heap Overflow in TLS 1.3 ECH parsing. An integer underflow existed in ECH extension parsing logic when calculating a buffer length, which resulted in writing beyond the bounds of an allocated buffer. Note that in wolfSSL, ECH is off by default, and the ECH standard is still evolving.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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