Bug 2553757 (CVE-2026-62322)

Summary: CVE-2026-62322 social-auth-core: social-auth-core: unauthorized account access via missing OAuth state validation in LINE backend
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dschmidt, ikhan, jlanda, jmitchel, jwong, kshier, omaciel, rbobbitt, simaishi, stcannon, ttakamiy, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in social-auth-core. The LINE authentication backend exchanges authorization codes without validating the returned Open Authorization (OAuth) state parameter. A remote attacker can exploit this flaw by enticing a victim into visiting a crafted callback URL, which can log the victim into an attacker-controlled account or link the attacker's identity to the victim's existing account. This vulnerability can lead to unauthorized account access and account takeover.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-15 19:34:07 UTC 
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.