wolfSSL ECDSA Certificate Verification

{
  "id": "6effc46f6866140a8b27e042040a36ab1ef927ac9cb2f25846038267388560aa",
  "url": "https://osv.dev/vulnerability/CVE-2026-5194",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wolfSSL ECDSA Certificate Verification",
    "summary": "Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.",
    "evidence": "osv:CVE-2026-5194",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-5194",
      "aliases": [
        "CVE-2026-5194"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:L/SA:L/U:Red"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wolfssl/wolfssl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d195009dcb62d8712195661bd1d50f8dd6831044"
                },
                {
                  "fixed": "1d363f3adceba9d1478230ede476a37b0dcdef24"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.12.0"
                      },
                      {
                        "fixed": "5.9.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.12.0"
                      },
                      {
                        "fixed": "5.9.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.9.0-stable",
            "v5.8.4-stable",
            "wolfEntropy2d",
            "v5.8.2-stable",
            "wolfEntropy1",
            "v5.8.0-stable",
            "v5.7.6-stable",
            "v5.7.4-stable",
            "v5.2.1",
            "v5.7.2-stable",
            "v5.7.0-stable",
            "v5.6.6-stable",
            "v5.6.4-stable",
            "WCv5.0-RC12",
            "WCv5.0-RC11",
            "WCv5.0-RC10",
            "v5.6.2-stable",
            "v5.6.3-stable",
            "v5.6.0-stable",
            "v5.5.4-stable",
            "v5.5.3-stable",
            "v5.5.2-stable",
            "v5.5.1-stable",
            "v5.5.0-stable",
            "v5.4.0-stable",
            "v5.3.0-stable",
            "v5.2.0-stable",
            "v5.1.0-stable",
            "v5.0.0-stable",
            "WCv5.0-RC9",
            "v4.8.0-stable",
            "v4.7.1r",
            "v4.7.0-stable",
            "v4.6.0-stable",
            "v4.5.0-stable",
            "v4.4.0-stable",
            "v4.3.0-stable",
            "v4.2.0c",
            "v4.2.0-stable",
            "v4.1.0-stable",
            "v4.0.0-stable",
            "list",
            "v3.15.7-stable",
            "v3.15.6",
            "v3.15.5a",
            "v3.15.5-stable",
            "WCv4-rng-stable",
            "v3.15.3-stable",
            "l",
            "v3.15.0-stable",
            "v3.14.4",
            "v3.14.2",
            "v3.14.0b",
            "v3.14.0a",
            "v3.14.0-stable",
            "v3.13.3",
            "v3.13.2",
            "v3.13.0-stable",
            "v3.12.2-stable",
            "v3.12.0-stable"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5194.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.502716799Z",
      "provider": "osv",
      "references": [
        "https://www.anthropic.com/research/glasswing-initial-update",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5194.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-5194",
        "https://github.com/wolfSSL/wolfssl/pull/10131",
        "https://github.com/wolfSSL/wolfssl"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-295"
        ],
        "cna_assigner": "wolfSSL",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5194.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-5194",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491975,
  "published_at": "2026-04-09T19:30:24.095+00:00"
}