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.
- Affected products
- Wolfssl
- Wolfssl
- ≤ 5.9.0
- CVSS 4.0
- 8.7 HIGH
- CVSS 3.1
- 5.9 MEDIUM
- EPSS
- 0.4% (28th percentile)
- Weakness
- CWE-20
- NVD status
- Analyzed
- Published
- 2026-04-10
CVE-2026-5500 at NVD
No indexed exploits for CVE-2026-5500 yet
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No exploit for CVE-2026-5500 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.