CVE-2026-62322 (GCVE-0-2026-62322)

Vulnerability from cvelistv5 – Published: 2026-10-15 18:45 – Updated: 2026-10-15 18:45
VLAI
Title
Python Social Auth: Login CSRF in LINE backend (LineOAuth2) — missing OAuth state validation (incomplete fix of 5.0.0 campaign)
Summary
Python Social Auth is a social authentication/registration mechanism. Prior to 5.0.2, the LINE backend exchanges an authorization code without validating the returned OAuth state. An attacker can begin authorization for an attacker-controlled LINE account and induce a victim to visit the resulting callback URL, causing the application to log the victim into the attacker's account. When account linking is enabled, the same missing validation can link the attacker's LINE identity to the victim's existing account and create a persistent unauthorized login path. Only applications with the LINE backend enabled are affected. This issue is fixed in version 5.0.2.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7627 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
python-social-auth social-core Affected: < 5.0.2
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "social-core",
          "vendor": "python-social-auth",
          "versions": [
            {
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              "version": "\u003c 5.0.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Python Social Auth is a social authentication/registration mechanism. Prior to 5.0.2, the LINE backend exchanges an authorization code without validating the returned OAuth state. An attacker can begin authorization for an attacker-controlled LINE account and induce a victim to visit the resulting callback URL, causing the application to log the victim into the attacker\u0027s account. When account linking is enabled, the same missing validation can link the attacker\u0027s LINE identity to the victim\u0027s existing account and create a persistent unauthorized login path. Only applications with the LINE backend enabled are affected. This issue is fixed in version 5.0.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-352",
              "description": "CWE-352: Cross-Site Request Forgery (CSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-15T18:45:06.452Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-526j-582w-7fm9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-526j-582w-7fm9"
        },
        {
          "name": "https://github.com/python-social-auth/social-core/pull/1829",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-social-auth/social-core/pull/1829"
        },
        {
          "name": "https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b"
        },
        {
          "name": "https://github.com/python-social-auth/social-core/releases/tag/5.0.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-social-auth/social-core/releases/tag/5.0.2"
        }
      ],
      "source": {
        "advisory": "GHSA-526j-582w-7fm9",
        "discovery": "UNKNOWN"
      },
      "title": "Python Social Auth: Login CSRF in LINE backend (LineOAuth2) \u2014 missing OAuth state validation (incomplete fix of 5.0.0 campaign)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62322",
    "datePublished": "2026-10-15T18:45:06.452Z",
    "dateReserved": "2026-07-13T19:27:58.314Z",
    "dateUpdated": "2026-10-15T18:45:06.452Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-62322",
      "date": "2026-10-21",
      "epss": "0.00153",
      "percentile": "0.0412"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "social-core",
                "vendor": "python-social-auth",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 5.0.2"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Python Social Auth is a social authentication/registration mechanism. Prior to 5.0.2, the LINE backend exchanges an authorization code without validating the returned OAuth state. An attacker can begin authorization for an attacker-controlled LINE account and induce a victim to visit the resulting callback URL, causing the application to log the victim into the attacker\u0027s account. When account linking is enabled, the same missing validation can link the attacker\u0027s LINE identity to the victim\u0027s existing account and create a persistent unauthorized login path. Only applications with the LINE backend enabled are affected. This issue is fixed in version 5.0.2."
          }
        ],
        "id": "CVE-2026-62322",
        "lastModified": "2026-10-16T20:02:37.630",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-15T19:17:42.213",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/python-social-auth/social-core/pull/1829"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/python-social-auth/social-core/releases/tag/5.0.2"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-526j-582w-7fm9"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-352"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-16T11:24:20+00:00",
      "cve": "CVE-2026-62322",
      "id": "CVE-2026-62322",
      "initial_release_date": "2026-10-15T18:45:06.452000+00:00",
      "product_status:known_affected": "16",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "social-auth-core: social-auth-core: unauthorized account access via missing OAuth state validation in LINE backend",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62322.json",
      "version": "3"
    }
  }
}



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