Heap-based Buffer Overflow Affecting wolfssl package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Mar 2026
- disclosed19 Mar 2026
- creditOleh Konko
Introduced: 19 Mar 2026
NewCVE-2026-3549 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow due to an integer underflow in the ECH extension parsing logic when calculating a buffer length, leading to writing beyond the bounds of an allocated buffer. An attacker can cause memory corruption or potentially execute arbitrary code by sending specially crafted TLS 1.3 ECH extension data. This is only exploitable if ECH is enabled in the configuration.