CVE-2026-46715

MEDIUM

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

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v4 5.3
EPSS 0.0028
EPSS Percentile 20.2%
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-287
Status published
Products (1)
pallets-eco/Flask-Security-Too >= 5.8.0, < 5.8.1
Published Jul 20, 2026
Tracked Since Jul 20, 2026