CVE-2026-46715
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
Vulnerability in Flask-Security-Too version 5.8.0 in the OAuth reauthentication flow can mark a session as fresh after verifying an OAuth account belonging to a different user. An attacker can use an authenticated but stale victim session to perform freshness-protected actions.
Risk Assessment
The risk involves session hijacking and performing sensitive operations on the victim's account, such as password or data changes.
Recommendation
It is recommended to update Flask-Security-Too to version 5.8.1, which contains the fix.
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Original NVD description (English source)
Flask-Security-Too allows users to add security features to their Flask applicationa. Version 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. Version 5.8.1 contains a fix for this issue.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS