CVE-2025-47278

flask: Flask Session Signing Fallback Key Vulnerability

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Severity

Low

Red Hat Product Security

2.3

CVSS 3.1

Review impact separately from score.

Published · May 14, 2025

Updated · June 28, 2026

Description

A flaw was found in Flask. This vulnerability allows sessions to be signed with stale keys via incorrect fallback key configuration.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 2.3
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

CWE-683 · Function Call With Incorrect Order of Arguments