Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
History

Tue, 14 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Gitroom
Gitroom postiz
CPEs cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:*
Vendors & Products Gitroom
Gitroom postiz

Mon, 13 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 13 Apr 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Gitroomhq
Gitroomhq postiz-app
Vendors & Products Gitroomhq
Gitroomhq postiz-app

Fri, 10 Apr 2026 19:45:00 +0000

Type Values Removed Values Added
Description Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
Title Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-10T19:20:16.365Z

Updated: 2026-04-13T20:55:15.792Z

Reserved: 2026-04-09T19:31:56.014Z

Link: CVE-2026-40168

cve-icon Vulnrichment

Updated: 2026-04-13T20:55:11.223Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-10T20:16:22.643

Modified: 2026-04-14T20:09:03.727

Link: CVE-2026-40168

cve-icon Redhat

No data.