TI-2026-34235 Aliases CVE-2026-46556 GHSA-xq32-9g7q-7297

FlaskBB: SSRF in get_image_info() via unrestricted avatar URL

MEDIUM 62CWE-918Published 2026-07-21 · Updated 2026-07-22

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00354 29th percentileScored 2026-11-07

Fix Fixed flaskbb (flaskbb): 2.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
flaskbb	flaskbb	before 2.2.1	2.2.1	Patch available	CNA
—	flaskbb (PyPI)	up to 2.2.0	—	No fix listed	GHSA-xq32-9g7q-7297

flaskbb Vendorflaskbb Affected before 2.2.1 Fixed in 2.2.1 Patch available CNA
flaskbb (PyPI) Vendor— Affected up to 2.2.0 Fixed in — No fix listed GHSA-xq32-9g7q-7297

Remediation

Fix · CNA flaskbb (flaskbb) Fixed in 2.2.1

Timeline

2026-10-02 Threatist record created from CVE-2026-46556
2026-10-03 Alias added: GHSA-xq32-9g7q-7297

References

Other 3

TI-2026-18195 FlaskBB Logic Flaw Authorization Group Deletion via Bulk AJAX Endpoint CVSS 4.0HIGH 8.6
TI-2026-18194 FlaskBB Authorization Bypass via Topic ID Manipulation CVSS 4.0HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences