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CVE-2026-101266

Status: DeferredLow (1.3)—

A logic flaw in the checkout flow allows users to bypass validations performed during the check-in by skipping entire check-in steps.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Fallo de lógica en flujo de checkout (CWE-20) accesible con autenticación (PR:L, AV:N). Permite bypasear validaciones, impactando integridad de datos y posible escalada de sesión.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementPassword PoliciesNetwork SegmentationMulti-factor Authentication

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-101266",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-101266",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-29T14:46:26.134826Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "655498c3-6ec5-4f0b-aea6-853b334d05a6",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 1.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "UNREPORTED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "subIntegrityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "655498c3-6ec5-4f0b-aea6-853b334d05a6",
      "affectedData": [
        {
          "repo": "https://github.com/pretix/pretix",
          "vendor": "pretix",
          "product": "pretix",
          "versions": [
            {
              "status": "affected",
              "version": "0.0",
              "lessThan": "2026.5.5",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "2026.6.0",
              "lessThan": "2026.6.2",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "2026.7.0",
              "lessThan": "2026.7.1",
              "versionType": "python"
            }
          ],
          "packageName": "pretix",
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-09-29T12:17:09.470",
  "references": [
    {
      "url": "https://pretix.eu/about/en/blog/20260929-release-2026-7-1/",
      "source": "655498c3-6ec5-4f0b-aea6-853b334d05a6"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "655498c3-6ec5-4f0b-aea6-853b334d05a6",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A logic flaw in the checkout flow allows users to bypass validations performed during the check-in by skipping entire check-in steps."
    }
  ],
  "lastModified": "2026-09-29T21:28:02.477",
  "sourceIdentifier": "655498c3-6ec5-4f0b-aea6-853b334d05a6"
}