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    4 vulnerabilities found for wolfEngine by wolfSSL Inc.

    CVE-2026-81341 (GCVE-0-2026-81341)

    Vulnerability from nvd – Published: 2026-08-28 14:43 – Updated: 2026-08-28 18:17
    VLAI
    Title
    wolfEngine reuses the AES-CCM nonce on TLS 1.2 / DTLS 1.2 records
    Summary
    wolfEngine before 1.4.1 sources the explicit AES-CCM nonce for TLS 1.2 and DTLS 1.2 records from the record input buffer instead of the TLS sequence number carried in the additional authenticated data. Because the record layer leaves the explicit-nonce field for the cipher to populate, the value read is constant across records, so every AES-CCM record within a connection is encrypted under an identical key and nonce pair. Reusing a CCM key and nonce weakens confidentiality (identical keystream across records, so a known record recovers the others) and integrity (authentication tag forgery). Only wolfEngine is affected; wolfProvider is not. AES-GCM under wolfEngine is tracked separately. AES-CCM cipher suites are not enabled by default and must be explicitly selected, which limits exposure. TLS 1.3 and non-TLS use of the cipher are not affected.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-28 18:17 UTC
    CWE
    • CWE-323 - Reusing a Nonce, Key Pair in Encryption
    Assigner
    References
    Impacted products
    Vendor Product Version
    wolfSSL Inc. wolfEngine Affected: 0 , ≤ 1.4.0 (git)
    		Create a notification for this product.
    Credits
    wolfSSL security team
    Show details on NVD website
    To clipboard 

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    CVE-2026-81020 (GCVE-0-2026-81020)

    Vulnerability from nvd – Published: 2026-08-28 14:42 – Updated: 2026-08-28 18:19
    VLAI
    Title
    wolfEngine reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record
    Summary
    wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.
    Severity
    7.4 (High)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-28 18:18 UTC
    CWE
    • CWE-323 - Reusing a Nonce, Key Pair in Encryption
    Assigner
    References
    Impacted products
    Vendor Product Version
    wolfSSL Inc. wolfEngine Affected: 0 , ≤ 1.4.0 (git)
    		Create a notification for this product.
    Credits
    wolfSSL security team
    Show details on NVD website
    To clipboard 

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    CVE-2026-81341 (GCVE-0-2026-81341)

    Vulnerability from cvelistv5 – Published: 2026-08-28 14:43 – Updated: 2026-08-28 18:17
    VLAI
    Title
    wolfEngine reuses the AES-CCM nonce on TLS 1.2 / DTLS 1.2 records
    Summary
    wolfEngine before 1.4.1 sources the explicit AES-CCM nonce for TLS 1.2 and DTLS 1.2 records from the record input buffer instead of the TLS sequence number carried in the additional authenticated data. Because the record layer leaves the explicit-nonce field for the cipher to populate, the value read is constant across records, so every AES-CCM record within a connection is encrypted under an identical key and nonce pair. Reusing a CCM key and nonce weakens confidentiality (identical keystream across records, so a known record recovers the others) and integrity (authentication tag forgery). Only wolfEngine is affected; wolfProvider is not. AES-GCM under wolfEngine is tracked separately. AES-CCM cipher suites are not enabled by default and must be explicitly selected, which limits exposure. TLS 1.3 and non-TLS use of the cipher are not affected.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-28 18:17 UTC
    CWE
    • CWE-323 - Reusing a Nonce, Key Pair in Encryption
    Assigner
    References
    Impacted products
    Vendor Product Version
    wolfSSL Inc. wolfEngine Affected: 0 , ≤ 1.4.0 (git)
    		Create a notification for this product.
    Credits
    wolfSSL security team
    Show details on NVD website
    To clipboard 

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    CVE-2026-81020 (GCVE-0-2026-81020)

    Vulnerability from cvelistv5 – Published: 2026-08-28 14:42 – Updated: 2026-08-28 18:19
    VLAI
    Title
    wolfEngine reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record
    Summary
    wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.
    Severity
    7.4 (High)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-28 18:18 UTC
    CWE
    • CWE-323 - Reusing a Nonce, Key Pair in Encryption
    Assigner
    References
    Impacted products
    Vendor Product Version
    wolfSSL Inc. wolfEngine Affected: 0 , ≤ 1.4.0 (git)
    		Create a notification for this product.
    Credits
    wolfSSL security team
    Show details on NVD website
    To clipboard 

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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "wolfEngine",
          "repo": "https://github.com/wolfSSL/wolfengine",
          "vendor": "wolfSSL Inc.",
          "versions": [
            {
              "lessThanOrEqual": "1.4.0",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "wolfSSL security team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003ewolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.\u003c/p\u003e"
            }
          ],
          "value": "wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-323",
              "description": "CWE-323 Reusing a Nonce, Key Pair in Encryption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T14:42:59.202Z",
        "orgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
        "shortName": "wolfSSL"
      },
      "references": [
        {
          "name": "wolfSSL security advisories",
          "url": "https://www.wolfssl.com/docs/security-vulnerabilities/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUpgrade to wolfEngine 1.4.1, which increments the explicit nonce after each record. As an interim mitigation use AES-CCM or TLS 1.3 instead of TLS 1.2 / DTLS 1.2 AES-GCM.\u003c/p\u003e"
            }
          ],
          "value": "Upgrade to wolfEngine 1.4.1, which increments the explicit nonce after each record. As an interim mitigation use AES-CCM or TLS 1.3 instead of TLS 1.2 / DTLS 1.2 AES-GCM."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "wolfEngine reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
    "assignerShortName": "wolfSSL",
    "cveId": "CVE-2026-81020",
    "datePublished": "2026-08-28T14:42:59.202Z",
    "dateReserved": "2026-08-26T14:40:11.656Z",
    "dateUpdated": "2026-08-28T18:19:58.580Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}