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CVE-2026-7532 wolfSSL CVE debrief

CVE-2026-7532 is a medium-severity vulnerability in wolfSSL, a popular cryptographic library. The issue arises when the WOLFSSL_IP_ALT_NAME configuration is not defined, allowing IP address name constraints to be bypassed. This could enable a certificate to circumvent an issuing Certificate Authority's (CA) IP address constraints. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 5.7. The vulnerability was published on June 25, 2026, and last modified on July 1, 2026. To address this vulnerability, users should review and apply patches provided by the vendor.

Vendor
wolfSSL
Product
wolfSSL
CVSS
MEDIUM 5.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-25
Original CVE updated
2026-07-01
Advisory published
2026-06-25
Advisory updated
2026-07-01

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-7532 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-7532

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-7532 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-7532

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.