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CVE PROGRAM SOURCE RECORD8.3 High

CVE-2026-3549

ECH parsing heap buffer overflow

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

wofSSL wolfSSL

Default version status: unaffected

  • 0 to < 5.9.0affected

References