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.
INFO
Published Date :
2026-03-19T20:09:27.036Z
Last Modified :
2026-03-19T20:09:27.036Z
Source :
wolfSSL
AFFECTED PRODUCTS
The following products are affected by CVE-2026-3549 vulnerability.
| Vendors | Products |
|---|---|
| Wolfssl |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3549.
| URL | Resource |
|---|---|
| https://github.com/wolfSSL/wolfssl/pull/9817 |
|
CVSS Vulnerability Scoring System
Detailed values of each vector for above chart.
Attack Vector
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Privileges Required
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SS Confidentiality
SS Integrity
SS Availability