Vulnerability Description
Postiz lets a signed-in user ask the backend to run a function on one of their connected channels. The backend did not restrict which functions can be requested, so a user could call internal helper functions that were never meant to be reachable from the web interface. One of those helpers reads a file from the server's disk. A user who connects a channel whose stored token is a file path can have the backend return the contents of any file it can read, including its environment, which holds the secret used to sign login sessions, the database address and the credentials of connected services. Another helper makes the backend process exit with a single request. Self-registration is open by default, so no existing account and no action by another user is needed.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://gadvisory.org/advisories/PSA-2026-JNXM56
- https://github.com/gitroomhq/postiz-app
- https://github.com/gitroomhq/postiz-app/commit/9383f5be4d310c346e33a3748a9a7ded6
- https://github.com/gitroomhq/postiz-app/releases/tag/v2.25.2
FAQ
What is CVE-2026-115931?
CVE-2026-115931 is a vulnerability with a CVSS score of 9.9 (CRITICAL). Postiz lets a signed-in user ask the backend to run a function on one of their connected channels. The backend did not restrict which functions can be requested, so a user could call internal helper f...
How severe is CVE-2026-115931?
CVE-2026-115931 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-115931?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.