---
id: CVE-2026-19264
title: Postiz is an open-source social media scheduling tool
summary: >-
  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 direct…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-22
published: '2026-08-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:52:31.783'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19264'
references:
  - url: 'https://gadvisory.org/advisories/PSA-2026-TH12B7'
    label: 4cdc9741-f887-419a-a2fd-acbbd2729276
  - url: 'https://github.com/gitroomhq/postiz-app/commit/7936062'
    label: 4cdc9741-f887-419a-a2fd-acbbd2729276
  - url: 'https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1'
    label: 4cdc9741-f887-419a-a2fd-acbbd2729276
tags:
  - nvd
  - exploit-available
epss: 0.00771
epssPercentile: 0.54197
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/DarkLycn1976/CVE-2026-19264'
  checkedAt: '2026-09-24T07:52:59.912Z'
exploitAvailable: true
ingestedAt: '2026-08-24T13:03:32.641Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.