VULNERABILITY INTELLIGENCE

CVE-2026-5500

CVSS score5.9 MEDIUM
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-04-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • facts@wolfssl.com: CWE-20

Primary references