CVE-2026-82629Public exploitNetwork attack vector

Authenticated arbitrary file upload via unvalidated extension

Published Aug 31, 2026 · Updated Aug 31, 2026

Unrestricted file upload in JEECG Jeewx-Boot commit 641ab52 allows remote authenticated users to store dangerous files. MyJwWebJwid3Controller.doUpload copies multipart bytes into the web upload directory while preserving an extension taken directly from the original filename, without validating the extension or content. High-privilege backend access is required; a crafted JSP filename places attacker-supplied content in the application upload tree.

CVSS severityUnavailable
Unscored
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 JEECG Jeewx-Boot commit 641ab52 allows remote authenticated users to store dangerous files. MyJwWebJwid3Controller.doUpload copies multipart bytes into the web upload directory while preserving an extension taken directly from the original filename, without validating the extension or content. High-privilege backend access is required; a crafted JSP filename places attacker-supplied content in the application upload tree.

The record

CVE
CVE-2026-82629
Published
Aug 31, 2026
Updated
Aug 31, 2026
Vendor
Beijing Guoju Information Technology Co., Ltd.
Product
Jeewx-Boot
Classifications
CWE-284, CWE-434, T1105
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 31, 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=641ab52c3e1845fec39996d7794c33fb40dad1dd

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Beijing Guoju Information Technology Co., Ltd. · Jeewx-Bootversion=641ab52c3e1845fec39996d7794c33fb40dad1dd

Published CVSS scores

4.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.8VulDBAV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
4.7VulDBCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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