GHSA-fp7w-m676-w7gc

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Source
https://github.com/advisories/GHSA-fp7w-m676-w7gc
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-fp7w-m676-w7gc/GHSA-fp7w-m676-w7gc.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-fp7w-m676-w7gc
Aliases
Published
2026-09-24T19:55:57Z
Modified
2026-09-24T20:15:04Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend
Details

Impact

The Vend OAuth2 backend used only the numeric Vend user_id as the social-auth UID.

When multiple Vend shops authenticate through the same application, users from different shops with the same internal Vend user ID could collide in the social-auth association table. A user from one shop could then be authenticated as the local account previously associated with the same numeric user ID from another shop.

The issue affects applications using the Vend OAuth2 backend with more than one Vend shop.

Patches

The issue has been fixed by scoping Vend social-auth UIDs by shop.

Users should upgrade to a patched version.

Fix:

Workarounds

Applications that cannot upgrade immediately should restrict the Vend OAuth2 backend to a single trusted Vend shop.

If Vend authentication is not required, the Vend backend can also be disabled by removing it from SOCIAL_AUTH_AUTHENTICATION_BACKENDS.

There is no complete workaround while continuing to allow authentication from multiple Vend shops with the vulnerable backend.

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:

Database specific 
{
    "cwe_ids":  [
        "CWE-289"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-24T19:55:57Z",
    "nvd_published_at":  "2026-09-24T18:17:14Z",
    "severity":  "MODERATE"
}
References

Affected packages

PyPI / social-auth-core

Package

Name
social-auth-core
View open source insights on deps.dev
Purl
pkg:pypi/social-auth-core

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.0.0

Affected versions

0.*
0.0.1
0.1.0
0.2.0
0.2.1
1.*
1.0.0
1.0.1
1.1.0
1.2.0
1.3.0
1.4.0
1.5.0
1.6.0
1.7.0
2.*
2.0.0
3.*
3.0.0
3.1.0
3.2.0
3.3.0
3.3.1
3.3.2
3.3.3
3.4.0
4.*
4.0.2
4.0.3
4.1.0
4.2.0
4.3.0
4.4.0
4.4.1
4.4.2
4.5.0
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.6.0
4.6.1
4.7.0
4.8.0
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.8.6
4.8.7
4.9.0
4.9.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-fp7w-m676-w7gc/GHSA-fp7w-m676-w7gc.json"