CVE-2026-115931: Arbitrary file read and backend crash through unrestricted provider method calls

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-23 · updated 2026-10-26
Weakness: CWE-73

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.

Affected products

gitroomhq postiz-app: from 2.23.0 before 2.25.2 — fixed in 2.25.2

How to fix

Upgrade to a fixed version: gitroomhq postiz-app 2.25.2. Check the vendor advisory for mitigations.

References

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