Vulnerability Description
Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://gadvisory.org/advisories/PSA-2026-TH12B7
- https://github.com/gitroomhq/postiz-app/commit/7936062
- https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1
FAQ
What is CVE-2026-19264?
CVE-2026-19264 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising th...
How severe is CVE-2026-19264?
CVE-2026-19264 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-19264?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.