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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00158.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vqg6-3fw6-j9jg social-auth-core has a Session Fixation issue
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/python-social-auth/social-core/security/advisories/GHSA-vqg6-3fw6-j9jg cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-57179 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-57179 cve-icon
History

Fri, 25 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-613
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 24 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description 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.
Title social-auth-core has a Session Fixation issue
Weaknesses CWE-384
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-24T18:11:46.002Z

Reserved: 2026-06-24T01:47:55.286Z

Link: CVE-2026-57179

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-24T18:17:15.120

Modified: 2026-09-24T19:17:14.510

Link: CVE-2026-57179

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-24T17:27:00Z

Links: CVE-2026-57179 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-25T06:00:13Z

Weaknesses