CVE-2026-19264 Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover
Unauthenticated attackers can read sensitive files via path traversal to steal secrets and forge admin sessions, leading to full instance takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19264?
CVE-2026-19264 is a critical path traversal vulnerability in gitroomhq postiz-app, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-19264?
How do I fix CVE-2026-19264?
No fix has been published for CVE-2026-19264 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-19264 being exploited?
There is no known exploitation of CVE-2026-19264 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-2p7p-3c9x-rwxm.