CVE-2026-56073 (GCVE-0-2026-56073)

Vulnerability from cvelistv5 – Published: 2026-06-19 21:39 – Updated: 2026-06-19 21:39
VLAI
Title
Cap-go - OTP Bypass via Response Manipulation in Email Verification
Summary
Cap-go before 12.128.2 contains an authentication bypass vulnerability in OTP verification that allows attackers to bypass email verification by modifying server responses. Attackers can intercept OTP verification requests and manipulate HTTP responses to falsely mark verification successful, enabling unauthorized 2FA enablement and account takeover.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
9.4 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
Impacted products
Vendor Product Version
Cap-go capgo Affected: 0 , < 12.128.2 (semver)
Unaffected: 12.128.2 (semver)
Create a notification for this product.
Date Public
2026-02-05 00:00
Credits
nancyhunter191
Show details on NVD website
To clipboard 

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          "vendor": "Cap-go",
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              "status": "affected",
              "version": "0",
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      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
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            "version": "3.1"
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      "problemTypes": [
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          "descriptions": [
            {
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              "description": "Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-06-19T21:39:18.855Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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      "references": [
        {
          "name": "GHSA Advisory GHSA-x2gq-85v8-j9v4",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-x2gq-85v8-j9v4"
        },
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          "name": "VulnCheck Advisory: Cap-go - OTP Bypass via Response Manipulation in Email Verification",
          "tags": [
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      "title": "Cap-go - OTP Bypass via Response Manipulation in Email Verification",
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  "cveMetadata": {
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    "cveId": "CVE-2026-56073",
    "datePublished": "2026-06-19T21:39:18.855Z",
    "dateReserved": "2026-06-18T15:57:20.434Z",
    "dateUpdated": "2026-06-19T21:39:18.855Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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