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TI-2026-74499 Aliases CVE-2026-61843

Unauthenticated file overwrite in FileRise via upload-enabled shares

Priority HIGH 75CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

FileRise from error311 before 3.18.0 accepts uploads that reuse the name of an existing file in upload-enabled share links. Missing authorization (CWE-862) lets an unauthenticated visitor with a valid share token and share password silently replace that file's content. Authenticated uploads and upload-only users without edit rights are affected too.

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 3.18.0, FileRise upload-enabled shared-folder and upload-only links do not reject a destination filename that already exists. An unauthenticated visitor with a valid share token and any configured share password can upload a file with the same name as an existing file and silently replace its content while the original uploader metadata remains. The same replacement gap affects ordinary authenticated uploads through /api/upload/upload.php and authenticated upload-only users who lack edit authority over the existing file. This issue is fixed in version 3.18.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Fixed FileRise (error311): 3.18.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 3.18.03.18.0Patch availableCNA
  • FileRise Vendorerror311 Affected before 3.18.0 Fixed in 3.18.0 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 3.18.0, which fixes this issue.

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

  • Fix · CNA FileRise (error311) Fixed in 3.18.0

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-61843
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → HIGH

References

Other 3

  • 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
  • TI-2026-74487 OIDC login in FileRise binds attackers to existing local accounts 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