CVE-2026-73243

MEDIUM 5.8

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

CVSS Score

5.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	kekingcn
Product	kkfileview
Published	Aug 11, 2026
Last Updated	Aug 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

kekingcn / kkFileView

< 5.0.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/kekingcn/kkFileView/security/advisories/GHSA-gwwj-52hv-6g2m github.com: https://github.com/kekingcn/kkFileView/issues/765 github.com: https://github.com/kekingcn/kkFileView/pull/767 github.com: https://github.com/kekingcn/kkFileView/commit/32a887aa2cd70228998c617c4e7df6cfcf3fe709 github.com: https://github.com/kekingcn/kkFileView/releases/tag/v5.0.1