Dromara free-fs 2.0.1 through 2.3.1 Share Code and Permission Scope Bypass

Advisories

Dromara free-fs 2.0.1 through 2.3.1 Share Code and Permission Scope Bypass

Severity: high
Date: 11/13/2026
Affecting: free-fs >= 2.0.1, <= 2.3.1
CVE: CVE-2026-129164
CWE: CWE-602 Client-Side Enforcement of Server-Side Security
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/service/impl/FileShareServiceImpl.java#L330-L333
https://github.com/dromara/free-fs/blob/f8f4ff2a0b0af8fcd5cbecbf99a4afb7d0b7c020/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/service/impl/FileShareServiceImpl.java#L390-L397
https://github.com/dromara/free-fs/blob/f8f4ff2a0b0af8fcd5cbecbf99a4afb7d0b7c020/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/service/impl/FileShareServiceImpl.java#L252-L268
Credit: Wu Yulun
Description: Dromara free-fs 2.0.1 through 2.3.1 contains an authorization bypass vulnerability that allows attackers to access code-protected shares because share codes are enforced only client-side. Attackers knowing a share ID can call the share items and download endpoints to list and download files without the code, even on preview-only shares.

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