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TI-2026-55285 Aliases CVE-2026-79913GHSA-jvh5-97xg-v99f

Incorrect comparison in cloudreve

Priority LOW 29CWE-697Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, the ValidateExternalURL server-side request forgery guard in pkg/request/ssrf.go passes resolved addresses to checkIP without decoding NAT64, IPv4-compatible, and 6to4 IPv4-in-IPv6 transition forms. An authenticated user with remote-download access can provide SrcUri through RemoteDownloadTask.createDownloadTask so a wrapper embedding a loopback, private, link-local, or cloud metadata IPv4 address is classified as public and fetched, exposing internal service responses and cloud instance credentials. IPv4-mapped IPv6 addresses remain blocked because Go converts that form with net.IP.To4. This issue is fixed in version 4.18.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00402 34th percentileScored 2026-11-07
Fix Fixed cloudreve (cloudreve): 4.18.0github.com/cloudreve/Cloudreve/v4 (Go): 4.0.0-20260715072853-1c5cad6dec7e

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
cloudrevecloudrevebefore 4.18.04.18.0Patch availableCNA
—github.com/cloudreve/Cloudreve/v4 (Go)before 4.0.0-20260715072853-1c5cad6dec7e4.0.0-20260715072853-1c5cad6dec7ePatch availableGHSA-jvh5-97xg-v99f
  • cloudreve Vendorcloudreve Affected before 4.18.0 Fixed in 4.18.0 Patch available CNA
  • github.com/cloudreve/Cloudreve/v4 (Go) Vendor— Affected before 4.0.0-20260715072853-1c5cad6dec7e Fixed in 4.0.0-20260715072853-1c5cad6dec7e Patch available GHSA-jvh5-97xg-v99f

Remediation

  • Fix · CNA cloudreve (cloudreve) Fixed in 4.18.0
  • Fix · GHSA-jvh5-97xg-v99f github.com/cloudreve/Cloudreve/v4 (Go) Fixed in 4.0.0-20260715072853-1c5cad6dec7e Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79913
  2. 2026-10-03 Alias added: GHSA-jvh5-97xg-v99f

References

Advisory 1

Other 4

  • TI-2026-65089 Cloudreve before 4.16.1 Authentication Bypass via Cached Context Hint CVSS 4.0MEDIUM 6.9
  • TI-2026-39397 Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim CVSS 3.1HIGH 7.6
  • TI-2026-40054 Cloudreve: OAuth Admin.Read scope can update OneDrive storage policy credentials CVSS 3.1HIGH 7.1
  • TI-2026-39400 Incorrect authorization in cloudreve CVSS 3.1HIGH 7.1
  • TI-2026-40050 Cloudreve: Server crash through image decompression/pixel bomb in thumbnail & avatar decoding (DoS) CVSS 3.1MEDIUM 6.5
  • TI-2026-39399 Cloudreve: Non-admin remote download users can SSRF loopback/internal services and read imported responses CVSS 3.1MEDIUM 6.5
See all 16 →

Sources

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