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CVE

free-fs unauthenticated file download in file stream preview

Affects free-fs 2.0.1 through 2.3.1, the file stream preview feature. The checked facts name no fixed version.

CVE-2026-129162EUVD-2026-125605

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

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

8.2HighCNA
Exploited
No known exploitation
Fix
No fix listed
Who is exposed
Not reported

Do first: Workaround: The checked facts name no workaround. No mitigation is stated here until the vendor publishes one.

Published
Last modified
Reference
Last checked
30/100 · provisional
Unclear
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Who should check

Teams running Dromara free-fs 2.0.1 through 2.3.1 for file storage or sharing

“Dromara free-fs 2.0.1 through 2.3.1”

vulncheck.com

cve.now Index

30Pcve.now Index 30 of 100 · methodology v3 · provisional
  • Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
  • Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
  • Reach?/20Unknown. No tracked technology or package matched
  • Severity8.2/10CVSS 8.2
  • No patch5/5No patch listed yet

What would change the score

  • Would score about 75 if added to CISA KEV
  • Would score about 70 if CISA's SSVC rates exploitation active
  • Would score about 35 if advisories confirm default setups are exposed

What to do

  • Workaround: The checked facts name no workaround. No mitigation is stated here until the vendor publishes one.

Check your systems with an agent

Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.

Check whether my systems are affected by CVE-2026-129162 (Dromara free-fs 2.0.1 through 2.3.1 Missing Authentication via File Stream Preview), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-129162 (entry last updated 2026-11-13):
Affected:
- dromara free-fs: from 2.0.1, through 2.3.1
Fixed versions: none listed yet.
Conditions (all must be true for the bug to be hit):
- free-fs versions 2.0.1 through 2.3.1 are affected (source: https://www.vulncheck.com/advisories/dromara-free-fs-2.0.1-through-2.3.1-missing-authentication-via-file-stream-preview)
- Attacker must hold a file ID, which can come from share listings or preview links (source: https://www.vulncheck.com/advisories/dromara-free-fs-2.0.1-through-2.3.1-missing-authentication-via-file-stream-preview)
- The file ID can be obtained through the SQL injection described in the same report (source: https://vul.yulun.ac.cn/20261024/free-fs/)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, no login, no user action.
CISA KEV: CVE-2026-129162 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-129162 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/dromara/free-fs/issues/28
- https://vul.yulun.ac.cn/20261024/free-fs/
- 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
- https://www.vulncheck.com/advisories/dromara-free-fs-2.0.1-through-2.3.1-missing-authentication-via-file-stream-preview
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-129162
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-129162"}.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • dromara free-fs

    From 2.0.1 · through 2.3.1

Evidence 7

CVE record · 2

Establishes: The identifier and description.

  1. Record
  2. Record

Other links · 5

  1. Report
  2. Repository
  3. Repository
  4. Link
  5. Link

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

Questions about CVE-2026-129162

Is CVE-2026-129162 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data

What does this mean?

The file stream preview lacks authentication, so a party without a login can download any user's or workspace's stored files if it holds the file ID. File IDs can come from share listings or preview links, or through the SQL injection described in the same report.Source: vulncheck.com, vul.yulun.ac.cn

Which versions are affected by CVE-2026-129162?

free-fs: from 2.0.1 through 2.3.1.Source: cve.now feed data

Am I affected, and how do I check?

free-fs versions 2.0.1 through 2.3.1 are affected. To check a deployment, look up the free-fs version it runs. The file ID is the key input, so share listings and preview links are the places it appears.Source: vulncheck.com, vul.yulun.ac.cn

How do I fix CVE-2026-129162?

The checked facts name no fixed version or vendor patch identifiers, so no upgrade target can be given from them. Check the vendor's release notes for a version after 2.3.1 that covers this issue.Source: vulncheck.com, vul.yulun.ac.cn

What if there's no patch?

The checked facts name no workaround. No mitigation is stated here until the vendor publishes one.Source: vulncheck.com, vul.yulun.ac.cn