CVE-2026-46556

MEDIUM

FlaskBB: SSRF in get_image_info() via unrestricted avatar URL

Title source: cna
STIX 2.1

Description

FlaskBB is a Forum Software written in Python using the micro framework Flask. Prior to version 2.2.1, a Server-Side Request Forgery (SSRF) vulnerability in get_image_info() allows any authenticated user to force the server to send HTTP requests to arbitrary internal endpoints, including cloud metadata services. This is a blind SSRF with confirmed internal port scanning and internal API triggering capabilities. Version 2.2.1 patches the issue.

References (2)

Core 2

Scores

CVSS v3 6.5
EPSS 0.0021
EPSS Percentile 11.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (1)
flaskbb/flaskbb < 2.2.1
Published Jul 21, 2026
Tracked Since Jul 22, 2026