python-social-auth social-core up to 5.0.1 LINE backend improper authorization

Summaryinfo

A vulnerability was found in python-social-auth social-core up to 5.0.1 and classified as critical. Affected by this issue is some unknown functionality of the component LINE backend. Such manipulation leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-62322. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in python-social-auth social-core up to 5.0.1 and classified as critical. Affected by this issue is an unknown code of the component LINE backend. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Python Social Auth is a social authentication/registration mechanism. Prior to 5.0.2, the LINE backend exchanges an authorization code without validating the returned OAuth state. An attacker can begin authorization for an attacker-controlled LINE account and induce a victim to visit the resulting callback URL, causing the application to log the victim into the attacker's account. When account linking is enabled, the same missing validation can link the attacker's LINE identity to the victim's existing account and create a persistent unauthorized login path. Only applications with the LINE backend enabled are affected. This issue is fixed in version 5.0.2.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-62322 since 07/13/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 5.0.2 eliminates this vulnerability.

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Productinfo

Type

• Programming Language Software

Vendor

• python-social-auth

Name

• social-core

Version

• 5.0.0
• 5.0.1

Website

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

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CPE 2.2info

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