Checkout validation bypass

{
  "id": "a3dc9f8c68c49b94bec8e428eff17f4753c08808b337faa91d39e4001fdbf923",
  "url": "https://osv.dev/vulnerability/CVE-2026-101266",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Checkout validation bypass",
    "summary": "A logic flaw in the checkout flow allows users to bypass validations performed during the check-in by skipping entire check-in steps.",
    "evidence": "osv:CVE-2026-101266",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-101266",
      "aliases": [
        "CVE-2026-101266"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pretix/pretix",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "bdfe683146859aaeb9b094aacc2058332ae26659"
                },
                {
                  "introduced": "fd565ecdb29c55a3e82dc15d94a848d193664caa"
                },
                {
                  "fixed": "91d7459ecd6d4e09da20d9ca7f0b5b171378ad9d"
                },
                {
                  "introduced": "79dcf60ed2bf22248869659a97e9ccda846ebc58"
                },
                {
                  "fixed": "b474664fb82309855d718d88a161095003bbeb22"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.0"
                      },
                      {
                        "fixed": "2026.5.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.6.0"
                      },
                      {
                        "fixed": "2026.6.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.7.0"
                      },
                      {
                        "fixed": "2026.7.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2026.5.4",
            "v2026.6.1",
            "v2026.7.0",
            "v2026.5.3",
            "v2026.6.0",
            "v2026.5.2",
            "v2026.5.1",
            "v2026.5.0",
            "v2026.4.0",
            "v2026.2.0",
            "v2026.3.0",
            "v2026.1.0",
            "v2025.10.0",
            "v2025.9.0",
            "v2025.8.0",
            "v2025.7.0",
            "v2025.6.0",
            "v2025.5.0",
            "v2025.4.0",
            "v2025.3.0",
            "v2025.2.0",
            "v2025.1.0",
            "v2024.11.0",
            "v2024.10.0",
            "v2024.9.0",
            "v2024.8.0",
            "v2024.7.0",
            "v2024.6.0",
            "v2024.5.0",
            "v2024.4.0",
            "v2024.3.0",
            "v2024.2.0",
            "v2023.8.0",
            "v2023.9.0",
            "v2024.1.0",
            "v2023.10.0",
            "v2023.7.0",
            "v2023.6.0",
            "v4.20.0",
            "v4.19.0",
            "v4.18.0",
            "v4.15.0",
            "v4.16.0",
            "v4.17.0",
            "v4.14.0",
            "v4.13.0",
            "v4.9.0",
            "v4.10.0",
            "v4.11.0",
            "v4.8.0",
            "v4.6.0",
            "v4.7.0",
            "v4.3.0",
            "v4.5.0",
            "v4.2.0",
            "v4.1.0",
            "v4.0.0",
            "v3.18.0",
            "v3.17.0",
            "v3.16.0",
            "v3.15.0",
            "v3.14.0",
            "v3.13.0",
            "v3.11.0",
            "v3.10.0",
            "v3.9.0",
            "v3.8.0",
            "v3.7.0",
            "v3.6.0",
            "v3.5.0",
            "v3.4.0",
            "v3.3.0",
            "v3.2.0",
            "v3.1.0",
            "v3.0.0",
            "v2.8.0",
            "v2.7.0",
            "s",
            "v2.6.0",
            "v2.5.0",
            "v2.4.0",
            "v2.3.0",
            "v2.2.0",
            "v2.1.0",
            "v2.0.0",
            "v1.17.0",
            "v1.16.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "v1.12.0",
            "v1.11.0",
            "v1.10.0",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.0",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "1.0.0",
            "1.0.0b2",
            "1.0.0b1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-101266.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.425627980Z",
      "provider": "osv",
      "references": [
        "https://pypi.python.org",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101266.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-101266",
        "https://pretix.eu/about/en/blog/20260929-release-2026-7-1/",
        "https://github.com/pretix/pretix"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "rami.io",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101266.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-101266",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488650,
  "published_at": "2026-09-29T11:53:52.379+00:00"
}