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TI-2026-74496 Aliases CVE-2026-57491

ZIP extraction in FileRise bypasses the upload blocklist

Priority MEDIUM 62CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

FileRise before 3.16.0, a self-hosted web file manager from error311, does not apply its upload filename policy when extracting ZIP archives. The flaw is unrestricted upload of a dangerous file type (CWE-434). An authenticated user with upload and extract permissions can place a blocked file such as a PHP-family file in a ZIP so it is written to disk. Where uploaded content is executed, this may allow code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.16.0, FileRise archive extraction does not apply UploadNamePolicy::isAllowedForWrite() before ZipArchive::extractTo() writes entries into the destination directory. An authenticated user with upload and extract permissions can place a blocked extension such as a PHP-family file inside a ZIP and cause it to be written to disk even when normal uploads reject that filename. Post-extraction metadata pruning does not remove the blocked file, so deployments that execute uploaded content may permit code execution. This issue is fixed in version 3.16.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00349 28th percentileScored 2026-11-07
Fix Fixed FileRise (error311): 3.16.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
error311FileRisebefore 3.16.03.16.0Patch availableCNA
  • FileRise Vendorerror311 Affected before 3.16.0 Fixed in 3.16.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:filerise:filerise:*:*:*:*:*:*:*:*——error311
  • cpe:2.3:a:filerise:filerise:*:*:*:*:*:*:*:* Versions — — ·error311

Remediation

Upgrade FileRise to version 3.16.0, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA FileRise (error311) Fixed in 3.16.0

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-57491
  2. 2026-10-16 CISA SSVC decision points changed

References

Other 3

  • TI-2026-74499 Unauthenticated file overwrite in FileRise via upload-enabled shares CVSS 3.1HIGH 8.2
  • TI-2026-25514 FileRise: Default Encryption Key Enables Token Forgery and Config Decryption CVSS 3.1HIGH 8.2
  • TI-2025-41705 FileRise vulnerable to Cross-Site Scripting (XSS) in SVG File Handling CVSS 3.1HIGH 8.9
  • TI-2026-25513 FileRise: WebDAV upload path bypasses filename validation enforced by regular uploads CVSS 3.1HIGH 8.8
  • TI-2026-74495 WebDAV authentication in FileRise skips TOTP two-factor check CVSS 3.1HIGH 8.1
  • TI-2026-74494 Authentication bypass in FileRise via spoofed reverse-proxy headers CVSS 3.1HIGH 8.1
See all 37 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences