Cloudanix VulnDB

CVE-2026-46715

None

Flask-Security-Too OAuth reauthentication freshness bypass via cross- user OAuth identity acceptance

CVSS

—

EPSS

0.5%

Published

May 22, 2026

CISA due date

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The record

Flask-Security-Too 5.8.0's OAuth reauthentication flow can mark a session as fresh after verifying an OAuth account that belongs to a different user. If an attacker can operate an already-authenticated but stale victim session, they can complete OAuth verification using their own OAuth identity. The victim session is then treated as recently reauthenticated, allowing freshness-protected account actions to proceed. This was reproduced against the built-in `/change-username` route.

Affected packages

Ecosystem Package Introduced Fixed

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