Vulnerability · Published Jul 21, 2026 · Assigned by GitHub_M
CVE-2026-46556FlaskBB: SSRF in get_image_info() via unrestricted avatar URL
Medium 6.5
In plain English
A medium-severity server-side request forgery in flaskbb from flaskbb. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | flaskbb | no fix listed | GHSA-xq32-9g7q-7297 |
| PyPI | flaskbb | no fix listed | PYSEC-2026-2479 |
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N