CVE-2026-3549

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

No CVSS.

References

Link	Resource
https://github.com/wolfSSL/wolfssl/pull/9817

Configurations

No configuration.

History

19 Mar 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-19 21:17

Updated : 2026-03-20 13:39

NVD link : CVE-2026-3549

Mitre link : CVE-2026-3549

CVE.ORG link : CVE-2026-3549

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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CVE-2026-3549

JSON object

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