CVE-2026-2146Public exploitNetwork attack vector

Authenticated arbitrary file upload via avatar endpoint

Published Feb 8, 2026 · Updated Feb 8, 2026

Unrestricted file upload in Yshopmall 1.9.0 through 1.9.1 allows remote authenticated users to upload arbitrary files through an avatar API. The /api/users/updateAvatar handler accepts an attacker-controlled File argument through co.yixiang.utils.FileUtil without enforcing an allowed image type. A low-privilege account is required; the public record confirms arbitrary file upload but does not establish code execution.

CVSS severity6.3
Medium
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 Yshopmall 1.9.0 through 1.9.1 allows remote authenticated users to upload arbitrary files through an avatar API. The /api/users/updateAvatar handler accepts an attacker-controlled File argument through co.yixiang.utils.FileUtil without enforcing an allowed image type. A low-privilege account is required; the public record confirms arbitrary file upload but does not establish code execution.

The record

CVE
CVE-2026-2146
Published
Feb 8, 2026
Updated
Feb 8, 2026
Vendor
Beijing Kaite Weiye Science and Technology Co., Ltd.
Product
Yshopmall
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 8, 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=1.9.0
  2. Affected versionversion=1.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Beijing Kaite Weiye Science and Technology Co., Ltd. · Yshopmallversion=1.9.0; version=1.9.1

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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