Vulnerability-Lookup

GHSA-526J-582W-7FM9

Vulnerability from github – Published: 2026-10-15 20:09 – Updated: 2026-10-15 20:09

Summary

Python Social Auth: Login CSRF in LINE backend (LineOAuth2) — missing OAuth state validation (incomplete fix of 5.0.0 campaign)

Details

Impact

Applications using the LINE Login backend are vulnerable to login CSRF / forced authentication. An attacker can start a LINE authorization flow for an account they control and trick a victim into visiting the callback URL with the attacker’s authorization code. Because the LINE backend did not validate the returned OAuth state, the application could accept the forged callback and log the victim in as the attacker-controlled LINE account.

If account linking is enabled, the same flaw can allow an attacker to link their LINE identity to a victim’s existing authenticated account, creating a persistent unauthorized login path.

Patches

https://github.com/python-social-auth/social-core/pull/1829

Workarounds

Only applications that enable the LINE backend are affected.

Credits

Thanks to Ta Duc Thien and Duc Anh Nguyen for reproting this via GitHub.

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "social-auth-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-62322"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-15T20:09:11Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nApplications using the LINE Login backend are vulnerable to login CSRF / forced authentication. An attacker can start a LINE authorization flow for an account they control and trick a victim into visiting the callback URL with the attacker\u2019s authorization code. Because the LINE backend did not validate the returned OAuth state, the application could accept the forged callback and log the victim in as the attacker-controlled LINE account.\n\nIf account linking is enabled, the same flaw can allow an attacker to link their LINE identity to a victim\u2019s existing authenticated account, creating a persistent unauthorized login path.\n\n### Patches\n* https://github.com/python-social-auth/social-core/pull/1829\n\n### Workarounds\n  Only applications that enable the LINE backend are affected.\n\n### Credits\n\nThanks to Ta Duc Thien and Duc Anh Nguyen for reproting this via GitHub.",
  "id": "GHSA-526j-582w-7fm9",
  "modified": "2026-10-15T20:09:11Z",
  "published": "2026-10-15T20:09:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-526j-582w-7fm9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/pull/1829"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-social-auth/social-core"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/releases/tag/5.0.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Python Social Auth: Login CSRF in LINE backend (LineOAuth2) \u2014 missing OAuth state validation (incomplete fix of 5.0.0 campaign)"
}

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

Vulnerability from cvelistv5 – Published: 2026-10-15 18:45 – Updated: 2026-10-15 18:45

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 7634 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/python-social-auth/social-core…	x_refsource_CONFIRM
https://github.com/python-social-auth/social-core…	x_refsource_MISC
https://github.com/python-social-auth/social-core…	x_refsource_MISC
https://github.com/python-social-auth/social-core…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
python-social-auth	social-core	Affected: < 5.0.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "social-core",
          "vendor": "python-social-auth",
          "versions": [
            {
              "status": "affected",
              "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"
          }
        }
      ],
      "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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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