Dromara free-fs 2.0.1 through 2.3.1 Missing Authentication via File Stream Preview

Advisories

Dromara free-fs 2.0.1 through 2.3.1 Missing Authentication via File Stream Preview

Severity: high
Date: 11/13/2026
Affecting: free-fs >= 2.0.1, <= 2.3.1
CVE: CVE-2026-129162
CWE: CWE-306 Missing Authentication for Critical Function
CVSS: 8.2
CVSS V4 Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References: https://vul.yulun.ac.cn/20261024/free-fs/
https://github.com/dromara/free-fs/issues/28
https://github.com/dromara/free-fs/blob/f8f4ff2a0b0af8fcd5cbecbf99a4afb7d0b7c020/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/controller/FileStreamController.java#L52-L77
https://github.com/dromara/free-fs/blob/f8f4ff2a0b0af8fcd5cbecbf99a4afb7d0b7c020/fs-admin/src/main/java/com/xddcodec/fs/web/WebMvcConfig.java#L50-L84
Credit: Wu Yulun
Description: Dromara free-fs 2.0.1 through 2.3.1 contains a missing authentication vulnerability in FileStreamController.preview that allows unauthenticated attackers to download stored files. Attackers who obtain a file ID from share listings or preview links can request /api/file/stream/preview/{fileId} to download any user's or workspace's files.

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