What is CVE-2026-3229?

CVE-2026-3229 is a medium-severity vulnerability in Wofssl Wolfssl, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-03-19.

How severe is CVE-2026-3229?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Wofssl Wolfssl

CVE-2026-3229

An integer overflow vulnerability existed in the static function wolfssl_add_to_chain, that caused heap corruption when certificate data was written out of bounds of an insufficiently sized certificate buffer. wolfssl_add_to_chain is called by these API: wolfSSL_CTX_add_extra_chain_cert, wolfSSL_CTX_add1_chain_cert, wolfSSL_add0_chain_cert. These API are enabled for 3rd party compatibility features: enable-opensslall, enable-opensslextra, enable-lighty, enable-stunnel, enable-nginx, enable-haproxy. This issue is not remotely exploitable, and would require that the application context loading certificates is compromised.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (0.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Wofssl Wolfssl — versions 0
Wolfssl

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

facts@wolfssl.com (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2026-3229?: CVE-2026-3229 is a medium-severity vulnerability in Wofssl Wolfssl, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-03-19.
How severe is CVE-2026-3229?: Medium severity. CVSS v3 base score is 5.5 out of 10.