GHSA-526j-582w-7fm9

Suggest an improvement
Source
https://github.com/advisories/GHSA-526j-582w-7fm9
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-526j-582w-7fm9/GHSA-526j-582w-7fm9.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-526j-582w-7fm9
Aliases
Published
2026-10-15T20:09:11Z
Modified
2026-10-15T20:15:04Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
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

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.

Database specific 
{
    "cwe_ids":  [
        "CWE-352"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-15T20:09:11Z",
    "nvd_published_at":  null,
    "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
5.0.2

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
5.*
5.0.0
5.0.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-526j-582w-7fm9/GHSA-526j-582w-7fm9.json"