Medium severity5.9NVD Advisory· Published Apr 10, 2026· Updated Apr 27, 2026
CVE-2026-5500
CVE-2026-5500
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
1- github.com/wolfSSL/wolfssl/pull/10102nvdIssue Tracking
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