What’s Vulnerable › Vulnerabilities
CVE-2026-5393: OOB Read in DoTls13CertificateVerify with WOLFSSL_DUAL_ALG_CERTS
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-10 · updated 2026-06-17
- Weakness: CWE-125
Description
Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL.
Affected products
- wolfSSL: before 5.9.1 — fixed in 5.9.1
How to fix
Upgrade to a fixed version: wolfSSL 5.9.1. Check the vendor advisory for mitigations.
References
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