CVE-2026-57176 (GCVE-0-2026-57176)

Vulnerability from cvelistv5 – Published: 2026-09-24 17:22 – Updated: 2026-09-24 17:22
VLAI
Title
social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend
Summary
Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the Vend OAuth2 backend used only the numeric Vend user_id as the social-auth UID. When multiple Vend shops authenticate through the same application, users from different shops with the same internal Vend user ID could collide in the social-auth association table. A user from one shop could then be authenticated as the local account previously associated with the same numeric user ID from another shop. The issue affects applications using the Vend OAuth2 backend with more than one Vend shop. Version 5.0.0 patches the issue.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-289 - Authentication Bypass by Alternate Name
Assigner
References
Impacted products
Vendor Product Version CPE status
python-social-auth social-core Affected: < 5.0.0
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{
  "containers": {
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      "affected": [
        {
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        }
      ],
      "metrics": [
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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            "version": "3.1"
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        "discovery": "UNKNOWN"
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      "title": "social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend"
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    "dateReserved": "2026-06-24T01:47:55.286Z",
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                "versions": [
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        "descriptions": [
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          }
        ],
        "id": "CVE-2026-57176",
        "lastModified": "2026-09-25T13:27:31.790",
        "metrics": {
          "cvssMetricV31": [
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              "cvssData": {
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      "cve": "CVE-2026-57176",
      "id": "CVE-2026-57176",
      "initial_release_date": "2026-09-24T17:22:54.850000+00:00",
      "product_status:known_affected": "20",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "social-auth-core: social-auth-core: Account takeover via Vend user ID collision",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57176.json",
      "version": "3"
    }
  }
}



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