CVE-2026-57175

Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the SAML backend accepted SAML responses on the Assertion Consumer Service endpoint without verifying that they matched a previously issued AuthnRequest. Applications using SAML account association could allow an attacker with a valid account on a trusted IdP to link the attacker's SAML identity to a logged-in victim's local account. The attacker could then authenticate through SAML and gain access to the victim's account. The issue affects applications using the SAML backend together with authenticated account association. The issue has been fixed in version 5.0.0 by validating SAML responses against stored AuthnRequest IDs.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-287"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57175.json"
}

References

Affected packages

Git / github.com/python-social-auth/social-core

Affected ranges

Type

GIT

Repo

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

Events

Introduced

Fixed

29dffe68c7c23f3d5cb5e051e7cb40447ffb55d5

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "5.0.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

0.*

0.0.1

0.1.0

0.2.0

0.2.1

1.*

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.*

4.0.0

4.0.1

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://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57175.json"