Heap-based Buffer Overflow Affecting wolfssl/wolfssl package, versions [,5.9.0)
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.
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- published31 Mar 2026
- disclosed19 Mar 2026
- creditJonathan Bar Or, Haruto Kimura
Introduced: 19 Mar 2026
NewCVE-2026-2646 (opens in a new tab)How to fix?
Upgrade wolfssl/wolfssl to version 5.9.0 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the wolfSSL_d2i_SSL_SESSION() function when deserializing session data with the SESSION_CERTS option enabled. An attacker can corrupt heap memory and potentially execute arbitrary code or cause a crash by supplying a maliciously crafted session from an external source.