CVE-2026-57489 FileRise: AUTH_BYPASS reverse-proxy header trust without source IP validation enables full authentication bypass
Unauthenticated attackers can bypass authentication and gain admin access by spoofing proxy headers if the backend is directly reachable and proxy auth is enabled.
- 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-2026-57489?
CVE-2026-57489 is a high-severity authentication bypass vulnerability in error311 FileRise, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.16.0, FileRise deployments with AUTH_BYPASS enabled trust the configured reverse-proxy identity header without verifying that the request originated from FR_TRUSTED_PROXIES. When the backend application port is reachable directly, an unauthenticated attacker can supply X-Remote-User and obtain a session for the asserted account, including an administrator account, without a password or MFA. The flaw is limited to deployments that enable proxy-header authentication and expose an untrusted path to the backend. This issue is fixed in version 3.16.0.
Weakness: CWE-290
Which versions are affected by CVE-2026-57489?
How do I fix CVE-2026-57489?
No fix has been published for CVE-2026-57489 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-57489 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57489 exists.
Sources
Also known as GHSA-98pg-w3jp-r8fv.