Heap-based Buffer Overflow Affecting wolfssl package, versions [0,]
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Heap-based Buffer Overflow vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CONAN-WOLFSSL-15762313
- published24 Mar 2026
- disclosed19 Mar 2026
- creditKunyuk, Pelioro
Introduced: 19 Mar 2026
NewCVE-2026-3229 (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 improper handling of integer values in the wolfssl_add_to_chain function. An attacker can cause heap corruption and potentially execute arbitrary code or crash the application by supplying specially crafted certificate data that triggers an out-of-bounds write. This is only exploitable if the application is built with specific 3rd party compatibility features enabled (such as enable-opensslall, enable-opensslextra, enable-lighty, enable-stunnel, or enable-nginx, enable-haproxy) and the application context loading certificates is compromised.