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CVE-2026-8720 HMAC-BLAKE2 final discards message when key length exceeds block size

🗓️ 25 Jun 2026 21:18:29Reported by wolfSSLType 
cvelist
 cvelist
🔗 www.cve.org👁 24 Views

HMAC-BLAKE2 final discards message when key exceeds block size, causing a key-only MAC.

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25 Jun 202622:17
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Rows per page
[
  {
    "vendor": "wolfSSL",
    "product": "wolfSSL",
    "collectionURL": "https://github.com/wolfSSL/wolfssl",
    "versions": [
      {
        "status": "affected",
        "version": "5.9.0",
        "lessThanOrEqual": "5.9.1",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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25 Jun 2026 21:18Current
CVSS 45.9
EPSS0.00111
24