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.
References
| Link | Resource |
|---|---|
| https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06 | Patch |
| https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5 | Product Release Notes |
| https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww | Exploit Mitigation Vendor Advisory |
| https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww | Exploit Mitigation Vendor Advisory |
Configurations
History
14 Apr 2026, 20:09
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Gitroom
Gitroom postiz |
|
| References | () https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06 - Patch | |
| References | () https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5 - Product, Release Notes | |
| References | () https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww - Exploit, Mitigation, Vendor Advisory | |
| CPE | cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:* |
13 Apr 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww - |
10 Apr 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-10 20:16
Updated : 2026-04-14 20:09
NVD link : CVE-2026-40168
Mitre link : CVE-2026-40168
CVE.ORG link : CVE-2026-40168
JSON object : View
Products Affected
gitroom
- postiz
CWE
CWE-918
Server-Side Request Forgery (SSRF)