CVE-2026-56215 (GCVE-0-2026-56215)

Vulnerability from cvelistv5 – Published: 2026-06-20 00:14 – Updated: 2026-06-20 00:14
VLAI
Title
Capgo - Account Merge via Poisoned public.users.email in SSO Provisioning
Summary
Capgo before 12.128.12 allows authenticated users to modify their mutable public.users.email to arbitrary addresses, which the SSO provisioning endpoint trusts as an account-merge key. Attackers can pre-position their account with a victim's corporate SSO email, causing the provision-user endpoint to merge the victim's SSO identity into the attacker-controlled account.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Capgo Capgo Affected: 0 , < 12.128.12 (semver)
Unaffected: 12.128.12 (semver)
Create a notification for this product.
Date Public
2026-05-08 00:00
Credits
Judel777
Show details on NVD website
To clipboard 

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      "affected": [
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          "defaultStatus": "unaffected",
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          "vendor": "Capgo",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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              "version": "12.128.12",
              "versionType": "semver"
            }
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        }
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          "type": "reporter",
          "value": "Judel777"
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      "datePublic": "2026-05-08T00:00:00.000Z",
      "descriptions": [
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          "lang": "en",
          "value": "Capgo before 12.128.12 allows authenticated users to modify their mutable public.users.email to arbitrary addresses, which the SSO provisioning endpoint trusts as an account-merge key. Attackers can pre-position their account with a victim\u0027s corporate SSO email, causing the provision-user endpoint to merge the victim\u0027s SSO identity into the attacker-controlled account."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "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:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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            "confidentialityImpact": "HIGH",
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            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-20T00:14:38.298Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GHSA Advisory GHSA-wqc6-fhwf-qpww",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-wqc6-fhwf-qpww"
        },
        {
          "name": "VulnCheck Advisory: Capgo - Account Merge via Poisoned public.users.email in SSO Provisioning",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/capgo-account-merge-via-poisoned-public-users-email-in-sso-provisioning"
        }
      ],
      "title": "Capgo - Account Merge via Poisoned public.users.email in SSO Provisioning",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-56215",
    "datePublished": "2026-06-20T00:14:38.298Z",
    "dateReserved": "2026-06-19T21:43:24.737Z",
    "dateUpdated": "2026-06-20T00:14:38.298Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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