Out-of-bounds read in wolfSSL - CVE-2026-5393
Published: April 14, 2026
Vulnerability identifier: #VU125943
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-5393
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: wolfSSL
Affected software:
wolfSSL
wolfSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in dual-algorithm CertificateVerify message processing when handling crafted input. A remote attacker can send a specially crafted CertificateVerify message to cause a denial of service.
This can only occur in builds compiled with both --enable-experimental and --enable-dual-alg-certs.
How to mitigate CVE-2026-5393
Install security update from vendor's website.