# CVE-2026-57489: FileRise authentication bypass via proxy header spoofing

Source: https://junglewise.ai/threats/cve-2026-57489-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-57489 · Severity: high · CVSS 8.1 · Published 2026-10-14

FileRise is a self-hosted web-based file manager that allows users to upload, edit, and manage files. In deployments before version 3.16.0 with proxy-header authentication enabled, an attacker who can reach the backend application directly can forge identity headers to gain unauthorized access to any account, including administrator accounts, without entering a password or multi-factor authentication. This could allow an attacker to steal or modify files and take over the system.

Technologies: [Error311 FileRise](https://junglewise.ai/threats/technologies/filerise). Vendors: [Error311](https://junglewise.ai/threats/vendors/error311).

## Quick answers

**Is CVE-2026-57489 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57489 being exploited in the wild.

**How severe is CVE-2026-57489?** High severity, with a CVSS score of 8.1, published 14 October 2026.

**Which products and versions are affected?** Error311 FileRise before 3.16.0.

**Is there a fix for CVE-2026-57489?** Yes: fixed in 3.16.0. Until then: Set the FR_TRUSTED_PROXIES environment variable to the IP address or CIDR range of your reverse proxy before upgrading to 3.16.0. Ensure the backend application port is not directly exposed to untrusted networks.</anigation>
<parameter name="attack_vector">["network"] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-57489 attacked?** It is in a web application.

**Am I affected by CVE-2026-57489?** Check whether you run Error311 FileRise at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.16.0

Set the FR_TRUSTED_PROXIES environment variable to the IP address or CIDR range of your reverse proxy before upgrading to 3.16.0. Ensure the backend application port is not directly exposed to untrusted networks.</anigation>
<parameter name="attack_vector">["network"]

## Technical details

The vulnerability exists in proxy-header authentication: FileRise accepts the X-Remote-User header for authentication but fails to validate that the request originated from a trusted reverse proxy (FR_TRUSTED_PROXIES). An unauthenticated attacker with network access to the backend application port can inject a crafted X-Remote-User header to impersonate any user. The flaw is limited to deployments with AUTH_BYPASS enabled and proxy-header login configured, where the backend is directly reachable.

## Affected products

- error311 FileRise before 3.16.0

## Timeline

- 2026-10-14: disclosed

## References

- [https://github.com/error311/FileRise/commit/f7114ca2a4e624238dda0d097a07ad6b05c11bb6](https://github.com/error311/FileRise/commit/f7114ca2a4e624238dda0d097a07ad6b05c11bb6)
- [https://github.com/error311/FileRise/releases/tag/v3.16.0](https://github.com/error311/FileRise/releases/tag/v3.16.0)

## Related threats

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- [FileRise TOTP bypass via session reset](https://junglewise.ai/threats/cve-2026-103977-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file)
- [FileRise missing CSRF enforcement for file creation](https://junglewise.ai/threats/cve-2026-54459-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file)
- [error311 FileRise path traversal in shared-folder upload](https://junglewise.ai/threats/cve-2026-54414-error311-filerise-path-traversal-in-shared-folder-upload)
- [error311 FileRise TOTP bypass in totp_setup.php](https://junglewise.ai/threats/cve-2026-44460-error311-filerise-totp-bypass-in-totp-setup-php)