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TI-2026-51380 Aliases CVE-2026-73243

kkFileView: Unauthenticated SSRF via /addTask with fullfilename type-confusion bypass

Priority HIGH 65CWE-918Published · Updated

Key facts

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

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

Summary

kkFileView is a universal file online preview project based on Spring Boot. Prior to 5.0.1, the unauthenticated GET /addTask endpoint in kkFileView is omitted from TrustHostFilter and TrustDirFilter in server/src/main/java/cn/keking/config/WebConfig.java, allowing FileConvertQueueTask to fetch an attacker-selected URL after FileHandlerService#getFileAttribute uses the fullfilename parameter to force an OFFICE, COMPRESS, or CAD type. This issue is fixed in version 5.0.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00432 37th percentileScored 2026-11-07
Fix Fixed kkFileView (kekingcn): 5.0.1

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
kekingcnkkFileViewbefore 5.0.15.0.1Patch availableCNA
  • kkFileView Vendorkekingcn Affected before 5.0.1 Fixed in 5.0.1 Patch available CNA

Remediation

  • Fix · CNA kkFileView (kekingcn) Fixed in 5.0.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73243

References

Other 5

  • TI-2026-51381 kkFileView: Unauthenticated path traversal in POST /listFiles allows arbitrary directory listing CVSS 3.1MEDIUM 5.3

Sources

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