CVE-2026-40168 — Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream
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 U…
Published: 2026-04-10 · CVSS: 8.2 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7