CVE-2026-73244: kkFileView: Unauthenticated path traversal in POST /listFiles allows arbitrary directory listing

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-10-24
Weakness: CWE-22

Description

kkFileView is a universal file online preview project based on Spring Boot. Prior to 5.0.1, the unauthenticated POST /listFiles endpoint in server/src/main/java/cn/keking/web/controller/FileController.java passes the user-controlled path parameter from FileController#getFiles to Files.newDirectoryStream without confinement to the demo directory, allowing directory enumeration outside the intended root. This issue is fixed in version 5.0.1.

Affected products

kekingcn kkFileView: before 5.0.1

References

https://github.com/kekingcn/kkFileView/commit/47745e4d74112000fcc4f0664e2fc751e6cf9bae
https://github.com/kekingcn/kkFileView/releases/tag/v5.0.1
https://github.com/kekingcn/kkFileView/security/advisories/GHSA-pmp8-g8p2-p6jq
https://github.com/kekingcn/kkFileView/security/advisories/GHSA-pmp8-g8p2-p6jq

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