Vulnerability-Lookup

GHSA-VQG6-3FW6-J9JG

Vulnerability from github – Published: 2026-09-24 19:58 – Updated: 2026-09-24 19:58

Summary

social-auth-core has a Session Fixation issue

Details

Impact

The partial-pipeline resume mechanism accepted partial_token as a bearer credential without binding it to the browser session that created it.

Applications using resumable partial pipeline steps could allow an attacker to start an authentication flow, obtain a valid partial token and verification data, and cause a victim's browser to resume that attacker-controlled flow. This could authenticate the victim's browser as the attacker's account.

The issue affects applications using partial pipeline steps such as mail_validation or custom steps decorated with @partial.

Patches

The issue has been fixed by binding partial pipeline resumes to the originating browser session.

Users should upgrade to a patched version.

Fix:

https://github.com/python-social-auth/social-core/pull/1816
https://github.com/python-social-auth/social-docs/pull/444
https://github.com/python-social-auth/social-app-django/pull/1009

Workarounds

Applications that cannot upgrade immediately should disable resumable partial pipeline steps, including mail_validation and custom steps decorated with @partial.

If those flows are required, applications should avoid accepting partial resume links from untrusted contexts until a patched version can be deployed.

There is no complete workaround while continuing to use the vulnerable partial-pipeline resume mechanism.

Credits

Reported through GitHub private vulnerability reporting by Liyi Zhou, Ziyue Wang, Strick, Maurice, and Chenchen Yu from the University of Sydney security research team.

Reporter references:

https://lzhou1110.github.io/
https://zyy0530.github.io/
https://str1ckl4nd.github.io/
https://maurice.busystar.org/
https://7thparkk.github.io/

Severity

4.2 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "social-auth-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-57179"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-384"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-24T19:58:14Z",
    "nvd_published_at": "2026-09-24T18:17:15Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nThe partial-pipeline resume mechanism accepted `partial_token` as a bearer credential without binding it to the browser session that created it.\n\nApplications using resumable partial pipeline steps could allow an attacker to start an authentication flow, obtain a valid partial token and verification data, and cause a victim\u0027s browser to resume that attacker-controlled flow. This could authenticate the victim\u0027s browser as the attacker\u0027s account.\n\nThe issue affects applications using partial pipeline steps such as `mail_validation` or custom steps decorated with `@partial`.\n\n### Patches\n\nThe issue has been fixed by binding partial pipeline resumes to the originating browser session.\n\nUsers should upgrade to a patched version.\n\nFix:\n\n* https://github.com/python-social-auth/social-core/pull/1816\n* https://github.com/python-social-auth/social-docs/pull/444\n* https://github.com/python-social-auth/social-app-django/pull/1009\n\n### Workarounds\n\nApplications that cannot upgrade immediately should disable resumable partial pipeline steps, including `mail_validation` and custom steps decorated with `@partial`.\n\nIf those flows are required, applications should avoid accepting partial resume links from untrusted contexts until a patched version can be deployed.\n\nThere is no complete workaround while continuing to use the vulnerable partial-pipeline resume mechanism.\n\n### Credits\n\nReported through GitHub private vulnerability reporting by Liyi Zhou, Ziyue Wang, Strick, Maurice, and Chenchen Yu from the University of Sydney security research team.\n\nReporter references:\n\n* https://lzhou1110.github.io/\n* https://zyy0530.github.io/\n* https://str1ckl4nd.github.io/\n* https://maurice.busystar.org/\n* https://7thparkk.github.io/",
  "id": "GHSA-vqg6-3fw6-j9jg",
  "modified": "2026-09-24T19:58:14Z",
  "published": "2026-09-24T19:58:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-vqg6-3fw6-j9jg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57179"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/pull/1816"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/commit/0418782454ac7bbc6a9230ea21f7f5066fe89686"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-social-auth/social-core"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-social-auth/social-core/releases/tag/5.0.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "social-auth-core has a Session Fixation issue"
}

CVE-2026-57179 (GCVE-0-2026-57179)

Vulnerability from cvelistv5 – Published: 2026-09-24 17:27 – Updated: 2026-09-24 18:11

Title

social-auth-core has a Session Fixation issue

Summary

Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the partial-pipeline resume mechanism accepted `partial_token` as a bearer credential without binding it to the browser session that created it. Applications using resumable partial pipeline steps could allow an attacker to start an authentication flow, obtain a valid partial token and verification data, and cause a victim's browser to resume that attacker-controlled flow. This could authenticate the victim's browser as the attacker's account. The issue affects applications using partial pipeline steps such as `mail_validation` or custom steps decorated with `@partial`. The issue has been fixed in version 5.0.0 by binding partial pipeline resumes to the originating browser session.

Severity

4.2 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-24 18:10 UTC

CWE

CWE-384 - Session Fixation

Assigner

GitHub_M mitre root

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
python-social-auth	social-core	Affected: < 5.0.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-57179",
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                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-24T18:10:50.898479Z",
                "version": "2.0.3"
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            }
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        "providerMetadata": {
          "dateUpdated": "2026-09-24T18:11:46.002Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "social-core",
          "vendor": "python-social-auth",
          "versions": [
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              "status": "affected",
              "version": "\u003c 5.0.0"
            }
          ]
        }
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
            "version": "3.1"
          }
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      "problemTypes": [
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          "descriptions": [
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      "providerMetadata": {
        "dateUpdated": "2026-09-24T17:27:00.152Z",
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          "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-vqg6-3fw6-j9jg"
        }
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      "source": {
        "advisory": "GHSA-vqg6-3fw6-j9jg",
        "discovery": "UNKNOWN"
      },
      "title": "social-auth-core has a Session Fixation issue"
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  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-57179",
    "datePublished": "2026-09-24T17:27:00.152Z",
    "dateReserved": "2026-06-24T01:47:55.286Z",
    "dateUpdated": "2026-09-24T18:11:46.002Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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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