CVE-2026-3187Public exploitNetwork attack vector

Arbitrary file storage via missing type allowlist

Published Feb 25, 2026 · Updated Feb 25, 2026

Unrestricted file upload in feiyuchuixue sz-boot-parent 1.3.2-beta allows remote authenticated users to store arbitrary file types. The /api/admin/sys-file/upload handler accepts the filename extension and declared MIME type without checking either against an allowlist before OSS storage. Valid access to the administrative upload API is required; the published evidence demonstrates arbitrary file storage but does not establish server-side execution.

CVSS severity9.8
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in feiyuchuixue sz-boot-parent 1.3.2-beta allows remote authenticated users to store arbitrary file types. The /api/admin/sys-file/upload handler accepts the filename extension and declared MIME type without checking either against an allowlist before OSS storage. Valid access to the administrative upload API is required; the published evidence demonstrates arbitrary file storage but does not establish server-side execution.

The record

CVE
CVE-2026-3187
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
feiyuchuixue
Product
sz-boot-parent
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.2-beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

feiyuchuixue · sz-boot-parentversion=1.3.2-beta

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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