CVE-2026-115931
Postiz lets a signed-in user ask the backend to run a function on one of their connected channels
- Risk score
- 70/100
- CVSS
- 9.9 v3.1
- Exploit chance (30 days)
- 0.6%
- Published
- 23 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Postiz allows a signed-in user to run internal helper functions on their connected channels, including reading files from the server's disk and making the backend process exit. An attacker can exploit this to obtain sensitive information and potentially gain control of the system.
- Affected
- {'products': [], 'packages': [], 'versions': []}
- Fix
- Check the linked advisory for a fix, as none is provided in the record.
- Exploitation
- Public proof of concept
Why it is Amber
- CVSS 9.9 critical
References
Original 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.
Last activity 23 Oct 2026. Patch Forecast updates every hour.