CVE-2026-3229 Integer Overflow in Certificate Chain Allocation
An integer overflow in wolfSSL certificate chain allocation can cause heap corruption and potential code execution if the application context is compromised.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-3229?
CVE-2026-3229 is a low-severity vulnerability in Wolfssl Wolfssl, published on 19 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-122
Which versions are affected by CVE-2026-3229?
It affects 1 product.
Products include Wolfssl Wolfssl.
How do I fix CVE-2026-3229?
Apply the vendor's patch.
Is CVE-2026-3229 being exploited?
There is no known exploitation of CVE-2026-3229 in the wild and no public exploit code.
Other vulnerabilities in Wolfssl Wolfssl
Sources
Also known as DEBIAN-CVE-2026-3229, GHSA-6p64-86qj-33gc, JLSEC-2026-703, UBUNTU-CVE-2026-3229.