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TI-2026-74488 Aliases CVE-2026-104109

FileRise ZIP extraction follows symlinks to overwrite external files

Priority MEDIUM 63CWE-59Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

FileRise before 3.23.0 by error311 extracts ZIP entries into the live destination before validating resolved paths. If that folder already holds a symlink to a directory outside the storage root (CWE-59), an authenticated non-administrator with extract permission who can place a ZIP in that folder can overwrite an external file. Post-extraction cleanup can then delete that file, if the FileRise process has the needed write or removal permission. The sources do not establish that an attacker can create the symlink through FileRise.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.23.0, FileRise validates archive entry names but extracts them directly into the authorized live destination before validating resolved paths. If that destination already contains a symlink to a directory outside the storage root, an authenticated non-administrator with extract permission who can upload or otherwise place an attacker-controlled ZIP in that folder can place an ordinary archive entry beneath the link. ZipArchive::extractTo() can then overwrite an external file, and post-extraction cleanup can delete that target through the same linked parent, only where the FileRise process has the required filesystem write or removal permission. The advisory does not establish that the attacker can create the prerequisite symlink through FileRise. This issue is fixed in version 3.23.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix Fixed FileRise (error311): 3.23.0

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 3.23.03.23.0Patch availableCNA
  • FileRise Vendorerror311 Affected before 3.23.0 Fixed in 3.23.0 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 3.23.0 or later, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA FileRise (error311) Fixed in 3.23.0

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-104109
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  3. 2026-10-29 CISA SSVC decision points changed
  4. 2026-10-29 Priority changed: LOW → MEDIUM

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