Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-5500

wolfSSL's wc_PKCS7_DecodeAuthEnvelopedData() does not properly sanitize the AES-GCM authentication tag length received and has no lower bounds check. A man-in-the-middle can therefore truncate the mac field from 16 bytes to 1 byte, reducing the tag check from 2⁻¹²⁸ to 2⁻⁸.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 34.0%
CVSS Severity
CVSS v3 Score 5.9
Products affected by CVE-2026-5500


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