Always-Incorrect Control Flow Implementation Affecting flask-security package, versions [5.8.0,5.8.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-FLASKSECURITY-16874295
- published25 May 2026
- disclosed22 May 2026
- credit0xHunSec
Introduced: 22 May 2026
CVE-2026-46715 (opens in a new tab)How to fix?
Upgrade Flask-Security to version 5.8.1 or higher.
Overview
Flask-Security is a Simple security for Flask apps.
Affected versions of this package are vulnerable to Always-Incorrect Control Flow Implementation in the OAuth reauthentication for stale sessions. An attacker can perform unauthorized account actions by completing OAuth verification with their own identity in a stale, authenticated victim session, causing the session to be marked as freshly reauthenticated and allowing actions such as changing the victim's username.