Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-10-15 18:45 – Updated: 2026-10-28 19:54

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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 19:54 UTC

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8083 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	CPE status
python-social-auth	social-core	Affected: < 5.0.2	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-62322

Vulnerability from fkie_nvd - Published: 2026-10-15 19:17 - Updated: 2026-10-28 20:18

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b
	security-advisories@github.com	https://github.com/python-social-auth/social-core/pull/1829
	security-advisories@github.com	https://github.com/python-social-auth/social-core/releases/tag/5.0.2
	security-advisories@github.com	https://github.com/python-social-auth/social-core/security/advisories/GHSA-526j-582w-7fm9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "product": "social-core",
          "vendor": "python-social-auth",
          "versions": [
            {
              "status": "affected",
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            }
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    }
  ],
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  "lastModified": "2026-10-28T20:18:28.530",
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          "baseScore": 6.5,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
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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)"
}

UBUNTU-CVE-2026-62322 (CVE-2026-62322)

Vulnerability from osv_ubuntu – Published: 2026-10-15 19:17 – Updated: 2026-10-28 17:38 – Source website

Details

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-62322	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-62322	REPORT
	https://github.com/python-social-auth/social-core…	REPORT
	https://github.com/python-social-auth/social-core…	REPORT
	https://github.com/python-social-auth/social-core…	REPORT
	https://github.com/python-social-auth/social-core…	REPORT
	https://github.com/python-social-auth/social-core…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-social-auth-core",
            "binary_version": "3.1.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "social-auth-core",
        "purl": "pkg:deb/ubuntu/social-auth-core@3.1.0-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-social-auth-core",
            "binary_version": "4.2.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "social-auth-core",
        "purl": "pkg:deb/ubuntu/social-auth-core@4.2.0-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.0-1.1",
        "4.1.0-1",
        "4.2.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-social-auth-core",
            "binary_version": "4.5.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "social-auth-core",
        "purl": "pkg:deb/ubuntu/social-auth-core@4.5.3-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.4.2-2",
        "4.5.3-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-social-auth-core",
            "binary_version": "4.8.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "social-auth-core",
        "purl": "pkg:deb/ubuntu/social-auth-core@4.8.3-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.6.1-1",
        "4.8.1-1",
        "4.8.3-1"
      ]
    }
  ],
  "aliases": [],
  "details": "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": "UBUNTU-CVE-2026-62322",
  "modified": "2026-10-28T17:38:17Z",
  "published": "2026-10-15T19:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62322"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-62322"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-526j-582w-7fm9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-social-auth/social-core/pull/1829"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-social-auth/social-core/commit/5b3b90d07ebccc1f5b076445b27ea35ec059764b"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-social-auth/social-core/releases/tag/5.0.2"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-62322"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-62322

GHSA-526J-582W-7FM9

Impact

Patches

Workarounds

Credits

UBUNTU-CVE-2026-62322 (CVE-2026-62322)

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