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Common Weakness Enumeration

CWE-434

Allowed

Unrestricted Upload of File with Dangerous Type

Abstraction: Base · Status: Draft

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

6277 vulnerabilities reference this CWE, most recent first.

CVE-2026-22799 (GCVE-0-2026-22799)

Vulnerability from cvelistv5 – Published: 2026-01-12 22:05 – Updated: 2026-01-13 19:08
VLAI
Title
emlog Arbitrary File Upload Vulnerability
Summary
Emlog is an open source website building system. emlog v2.6.1 and earlier exposes a REST API endpoint (/index.php?rest-api=upload) for media file uploads. The endpoint fails to implement proper validation of file types, extensions, and content, allowing authenticated attackers (with a valid API key or admin session cookie) to upload arbitrary files (including malicious PHP scripts) to the server. An attacker can obtain the API key either by gaining administrator access to enable the REST API setting, or via information disclosure vulnerabilities in the application. Once uploaded, the malicious PHP file can be executed to gain remote code execution (RCE) on the target server, leading to full server compromise.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 14:14 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
References
Impacted products
Vendor Product Version
emlog emlog Affected: <= 2.6.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-22789 (GCVE-0-2026-22789)

Vulnerability from cvelistv5 – Published: 2026-01-12 21:52 – Updated: 2026-01-13 19:41
VLAI
Title
WebErpMesv2 has a File Upload Validation Bypass Leading to RCE
Summary
WebErpMesv2 is a Resource Management and Manufacturing execution system Web for industry. Prior to 1.19, WebErpMesv2 contains a file upload validation bypass vulnerability in multiple controllers that allows authenticated users to upload arbitrary files, including PHP scripts, leading to Remote Code Execution (RCE). This vulnerability is identical in nature to CVE-2025-52130 but exists in different code locations that were not addressed by the original fix. This vulnerability is fixed in 1.19.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 19:41 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-616 - Incomplete Identification of Uploaded File Variables (PHP)
References
Impacted products
Vendor Product Version
SMEWebify WebErpMesv2 Affected: < 1.19
Create a notification for this product.
Show details on NVD website

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CVE-2026-22786 (GCVE-0-2026-22786)

Vulnerability from cvelistv5 – Published: 2026-01-12 21:09 – Updated: 2026-01-13 19:15
VLAI
Title
Gin-vue-admin has arbitrary file upload vulnerability caused by path traversal
Summary
Gin-vue-admin is a backstage management system based on vue and gin. Gin-vue-admin <= v2.8.7 has a path traversal vulnerability in the breakpoint resume upload functionality. Attacker can upload any files on any directory. In the breakpoint_continue.go file, the MakeFile function accepts a fileName parameter through the /fileUploadAndDownload/breakpointContinueFinish API endpoint and directly concatenates it with the base directory path (./fileDir/) using os.OpenFile() without any validation for directory traversal sequences (e.g., ../). An attacker with file upload privileges could exploit this vulnerability.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-12 21:27 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
Impacted products
Show details on NVD website

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CVE-2026-22783 (GCVE-0-2026-22783)

Vulnerability from cvelistv5 – Published: 2026-01-12 18:27 – Updated: 2026-01-12 18:52
VLAI
Title
Iris Allows Arbitrary File Deletion via Mass Assignment in Datastore File Management
Summary
Iris is a web collaborative platform that helps incident responders share technical details during investigations. Prior to 2.4.24, the DFIR-IRIS datastore file management system has a vulnerability where mass assignment of the file_local_name field combined with path trust in the delete operation enables authenticated users to delete arbitrary filesystem paths. The vulnerability manifests through a three-step attack chain: authenticated users upload a file to the datastore, update the file's file_local_name field to point to an arbitrary filesystem path through mass assignment, then trigger the delete operation which removes the target file without path validation. This vulnerability is fixed in 2.4.24.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-12 18:51 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes
  • CWE-73 - External Control of File Name or Path
References
Impacted products
Vendor Product Version
dfir-iris iris-web Affected: < 2.4.24
Create a notification for this product.
Show details on NVD website

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CVE-2026-22766 (GCVE-0-2026-22766)

Vulnerability from cvelistv5 – Published: 2026-02-24 19:28 – Updated: 2026-03-20 19:43
VLAI
Summary
Dell Wyse Management Suite, versions prior to WMS 5.5, contain an Unrestricted Upload of File with Dangerous Type vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Remote execution.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-26 04:56 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
References
Impacted products
Vendor Product Version
Dell Wyse Management Suite Affected: 0 , < 5.5* (semver)
Create a notification for this product.
Date Public
2026-02-24 18:00
Show details on NVD website

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CVE-2026-22707 (GCVE-0-2026-22707)

Vulnerability from cvelistv5 – Published: 2026-05-14 18:40 – Updated: 2026-05-14 19:40
VLAI
Title
Strapi Upload Plugin MIME Validation Bypass via Content API
Summary
Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions (`plugin.upload.security.allowedTypes` and `deniedTypes`). The same restrictions were correctly enforced on the Admin Panel upload path. The upload plugin's `enforceUploadSecurity` security check was invoked in the admin upload controller but was missing from the Content API controller. The Content API handlers `uploadFiles` and `replaceFile` (and the `upload` wrapper that dispatches to them) called the underlying upload service directly, bypassing both the magic-byte MIME detection and the configured allow/deny lists. An authenticated user with the Content API upload permission could therefore upload file types the administrator had explicitly disallowed, including HTML and SVG content. In deployments serving uploaded files from the same origin as the admin panel (default), an attacker could upload an HTML or SVG file that, when opened directly by an admin, executed JavaScript in the admin origin, enabling admin-session hijack and authenticated administrative actions against the admin API. The patch in version 5.33.3 introduces a shared `prepareUploadRequest` helper that wraps `enforceUploadSecurity` and is called from both the Content API and admin upload controllers, ensuring identical security policy enforcement on every upload entry point.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 19:39 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-693 - Protection Mechanism Failure
References
Impacted products
Show details on NVD website

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CVE-2026-22327 (GCVE-0-2026-22327)

Vulnerability from cvelistv5 – Published: 2026-06-17 09:50 – Updated: 2026-06-17 12:36
VLAI
Title
WordPress Restaurt theme <= 1.0.4 - Arbitrary File Upload vulnerability
Summary
Subscriber Arbitrary File Upload in Restaurt <= 1.0.4 versions.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 12:36 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
References
Impacted products
Vendor Product Version
Zozothemes Restaurt Affected: n/a , ≤ 1.0.4 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-22241 (GCVE-0-2026-22241)

Vulnerability from cvelistv5 – Published: 2026-01-08 15:07 – Updated: 2026-01-23 18:18
VLAI
Title
Open eClass has Unrestricted File Upload that Leads to Remote Code Execution (RCE)
Summary
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SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 15:50 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Impacted products
Vendor Product Version
gunet openeclass Affected: < 4.2
Create a notification for this product.
Show details on NVD website

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CVE-2026-21877 (GCVE-0-2026-21877)

Vulnerability from cvelistv5 – Published: 2026-01-08 00:39 – Updated: 2026-01-08 18:59
VLAI
Title
n8n is vulnerable to Remote Code Execution via Arbitrary File Write
Summary
n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 18:59 UTC
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
References
Impacted products
Vendor Product Version
n8n-io n8n Affected: < 1.121.3
Create a notification for this product.
Show details on NVD website

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CVE-2026-21662 (GCVE-0-2026-21662)

Vulnerability from cvelistv5 – Published: 2026-07-31 17:30 – Updated: 2026-07-31 18:24
VLAI
Title
FMS Employee Allows Upload of Unrestricted Files
Summary
Unrestricted upload of file with dangerous type vulnerability in Johnson Controls FM Systems Employee allows Using Malicious Files. This issue affects FM Systems Employee: before 2025.3.1.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 18:24 UTC
CWE
  • CWE-434 - Unrestricted upload of file with dangerous type
Impacted products
Vendor Product Version
Johnson Controls FM Systems Employee Affected: 0 , < 2025.3.1 (custom)
    cpe:2.3:a:johnson_controls:fm_systems_employee:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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Mitigation
Architecture and Design

Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.[REF-422] [REF-423]

Mitigation MIT-21
Architecture and Design

Strategy: Enforcement by Conversion

When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.

Mitigation
Architecture and Design

Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
Mitigation
Architecture and Design

Define a very limited set of allowable extensions and only generate filenames that end in these extensions. Consider the possibility of XSS (CWE-79) before allowing .html or .htm file types.

Mitigation
Implementation

Strategy: Input Validation

Ensure that only one extension is used in the filename. Some web servers, including some versions of Apache, may process files based on inner extensions so that "filename.php.gif" is fed to the PHP interpreter.[REF-422] [REF-423]

Mitigation
Implementation

When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.

Mitigation MIT-15
Architecture and Design

For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

Mitigation
Implementation

Do not rely exclusively on sanity checks of file contents to ensure that the file is of the expected type and size. It may be possible for an attacker to hide code in some file segments that will still be executed by the server. For example, GIF images may contain a free-form comments field.

Mitigation
Implementation

Do not rely exclusively on the MIME content type or filename attribute when determining how to render a file. Validating the MIME content type and ensuring that it matches the extension is only a partial solution.

Mitigation MIT-17
Architecture and Design Operation

Strategy: Environment Hardening

Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.

Mitigation MIT-22
Architecture and Design Operation

Strategy: Sandbox or Jail

  • Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs

In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.