Security advisory

{
  "id": "213ea2ef209da655872cdaae4941bc3cbf1497291bb2def7c114b74d19fef79c",
  "url": "https://osv.dev/vulnerability/CVE-2021-37155",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-37155",
    "summary": "wolfSSL 4.6.x through 4.7.x before 4.8.0 does not produce a failure outcome when the serial number in an OCSP request differs from the serial number in the OCSP response.",
    "evidence": "osv:CVE-2021-37155",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-37155",
      "aliases": [
        "CVE-2021-37155"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wolfssl/wolfssl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9c87f979a7f1d3a6d786b260653d566c1d31a1c4"
                },
                {
                  "fixed": "add4a68465bcdad238bcf3e5f2771d8da05e6285"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.6.0"
                      },
                      {
                        "fixed": "4.8.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "add4a68465bcdad238bcf3e5f2771d8da05e6285"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.8.0-stable"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.7.1r",
            "v4.7.0-stable",
            "v4.6.0-stable"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37155.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:49.542842587Z",
      "provider": "osv",
      "references": [
        "https://github.com/wolfSSL/wolfssl/releases/tag/v4.8.0-stable",
        "https://github.com/wolfSSL/wolfssl/pull/3990"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-37155",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386220,
  "published_at": "2021-07-21T15:16:20.733+00:00"
}