CVE-2026-7532 wolfSSL CVE debrief

Who should care

Organizations using wolfSSL in their applications should be aware of this vulnerability and take steps to mitigate it. This includes reviewing the configuration of WOLFSSL_IP_ALT_NAME and applying patches or updates provided by the vendor. Additionally, Certificate Authorities and those responsible for managing IP address name constraints should be vigilant about potential bypass attempts.

Technical summary

The vulnerability in wolfSSL occurs when the WOLFSSL_IP_ALT_NAME configuration is not defined. In this scenario, IP address name constraints are not enforced, potentially allowing a certificate to bypass an issuing CA's IP address constraints. This issue has been assigned a CVSS score of 5.7, indicating a medium level of severity. The vulnerability was disclosed on June 25, 2026, and updated on July 1, 2026. Affected versions of wolfSSL include those up to but not including 5.9.2.

Defensive priority

Medium priority should be given to addressing CVE-2026-7532, as it could allow for the bypassing of IP address name constraints in certain configurations of wolfSSL. Applying patches or updates provided by the vendor is recommended.

Recommended defensive actions

• Review and apply patches provided by wolfSSL to address the vulnerability.
• Verify the configuration of WOLFSSL_IP_ALT_NAME in your applications.
• Monitor for potential bypass attempts of IP address name constraints.
• Update documentation and procedures for managing IP address name constraints.
• Perform a thorough inventory check of systems and applications using wolfSSL.

Evidence notes

The CVE-2026-7532 vulnerability details were obtained from the National Vulnerability Database (NVD) and the wolfSSL GitHub repository. The NVD provides a comprehensive overview of the vulnerability, including its CVSS score, affected versions, and references to vendor advisories and patches. The wolfSSL GitHub repository contains information about the patch and issue tracking.

Official resources