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CVE-2026-56081

Status: DeferredCritical (9.3)—

Cap-go before 12.128.2 contains an authentication logic flaw that lets an attacker register and control an account bound to a victim's email address before that email is verified. By enabling two-factor authentication on the pre-registered account, the attacker gains control over the account claimed under the victim's identity, allowing them to read and modify its state and enforce organization-level policies, while the legitimate user is denied access to the account tied to their own email.

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.

Flaw de autenticación en aplicación web (AV:N, PR:N, UI:N) permite registrar cuenta con email ajeno. Impactos: secuestro de cuenta (T1098.002), imposición de políticas 2FA (T1556.001), acceso a datos de la cuenta (T1005).

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

Privileged Account ManagementVulnerability ScanningNetwork SegmentationMulti-factor AuthenticationLimit Access to Resource Over NetworkFilter Network Traffic

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Capgo — Cap-goAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-56081",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-56081",
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          "options": [
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              "exploitation": "poc"
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              "automatable": "yes"
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              "technicalImpact": "total"
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          "version": "2.0.3",
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          "integrityImpact": "HIGH",
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    "cvssMetricV40": [
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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          "versions": [
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  "published": "2026-06-19T22:16:18.017",
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    {
      "lang": "en",
      "value": "Cap-go before 12.128.2 contains an authentication logic flaw that lets an attacker register and control an account bound to a victim's email address before that email is verified. By enabling two-factor authentication on the pre-registered account, the attacker gains control over the account claimed under the victim's identity, allowing them to read and modify its state and enforce organization-level policies, while the legitimate user is denied access to the account tied to their own email."
    }
  ],
  "lastModified": "2026-06-22T19:17:22.953",
  "sourceIdentifier": "disclosure@vulncheck.com"
}