Authentication Bypass in OpenPubKey

{
  "id": "6b616ecf330adb73a6768fa48bdeb0e76eee66bb1eed3887233ff30eb47f869a",
  "url": "https://osv.dev/vulnerability/CVE-2025-3757",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Authentication Bypass in OpenPubKey",
    "summary": "Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.",
    "evidence": "osv:CVE-2025-3757",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2025-3757",
      "aliases": [
        "CVE-2025-3757",
        "GHSA-537f-gxgm-3jjq",
        "GO-2025-3679"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/AU:Y"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openpubkey/openpubkey",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d6907a99021f102d115fd1f2d40c5fa973975256"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "Openpubkey"
                      },
                      {
                        "last_affected": "0.9.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:openpubkey:openpubkey:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.10.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.0",
            "v0.8.0",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.0",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.0",
            "v0.3.0",
            "v0.2.1",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-3757.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.136417096Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3757.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-3757",
        "https://github.com/openpubkey/openpubkey"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-305"
        ],
        "cna_assigner": "cloudflare",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3757.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-3757",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490489,
  "published_at": "2025-05-13T16:33:18.074+00:00"
}