CVE-2026-34577

Postiz (AI social media scheduling) before version 2.21.3 was vulnerable to an unauthenticated SSRF via GET /public/stream. The endpoint proxies a user-supplied url parameter and only validates url.endsWith('mp4'), which is trivially bypassed by appending .mp4 in the parameter or URL fragment, al...

CVE-2026-34577

Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the GET /public/stream endpoint in PublicController accepts a user-supplied url query parameter and proxies the full HTTP response back to the caller. The only validation is url.endsWith'mp4', which is trivially bypassable by...