Recommended action window: Monitor and triage in normal cycle
NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
🚨 CVE-2026-115931 (9.9) 🚨 Postiz lets anyone who signs up read files on the server, including the secret that signs login sessions, and crash the backend on request. No fixed version is named. Self-registration is on by default, so anyone can sign up. https://t.co/DaeY93KHfP
🚨 CVE-2026-115931 (CVSS 9.9 Critical) Unrestricted provider calls in Postiz allow self-registered users to read arbitrary files (.env, secrets) or crash the backend. ⚡ Action: Update Postiz to >= v2.25.2. 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-115931/ https://t.co/61TmiLrkMB