PYSEC-2026-1731 Open WebUI allows Remote Code Execution via Arbitrary File Upload to /audio/api/v1/transcriptions

OpenWebUI version 0.3.0 contains a vulnerability in the audio API endpoint /audio/api/v1/transcriptions that allows for arbitrary file upload. The application performs insufficient validation on the file.contenttype and allows user-controlled filenames, leading to a path traversal vulnerability...

Open WebUI Allows Arbitrary File Write via the `/models/upload` Endpoint

In open-webui version 0.3.8, the endpoint /models/upload is vulnerable to arbitrary file write due to improper handling of user-supplied filenames. The vulnerability arises from the usage of filepath = f"UPLOADDIR/file.filename" without proper input validation or sanitization. An attacker can...

PYSEC-2026-1730 Open WebUI Allows Arbitrary File Write via the `/models/upload` Endpoint

In open-webui version 0.3.8, the endpoint /models/upload is vulnerable to arbitrary file write due to improper handling of user-supplied filenames. The vulnerability arises from the usage of filepath = f"UPLOADDIR/file.filename" without proper input validation or sanitization. An attacker can...

Open WebUI Vulnerable to Cross-Site Scripting (XSS) via Chat File Upload

A Stored Cross-Site Scripting XSS vulnerability exists in the chat file upload functionality of open-webui/open-webui version 0.3.8. An attacker can inject malicious content into a file, which, when accessed by a victim through a URL or shared chat, executes JavaScript in the victim's browser. Th...

PYSEC-2026-1736 Open WebUI Vulnerable to Cross-Site Scripting (XSS) via Chat File Upload

A Stored Cross-Site Scripting XSS vulnerability exists in the chat file upload functionality of open-webui/open-webui version 0.3.8. An attacker can inject malicious content into a file, which, when accessed by a victim through a URL or shared chat, executes JavaScript in the victim's browser. Th...

FastChat Denial of Service vulnerability

A Denial of Service DoS vulnerability exists in the file upload feature of lm-sys/fastchat version 0.2.36. The vulnerability is due to improper handling of form-data with a large filename in the file upload request. An attacker can exploit this by sending a payload with an excessively large...

InvokeAI has Denial of Service (DoS) vulnerability in `/api/v1/images/upload`

A Denial of Service DoS vulnerability in the multipart request boundary processing mechanism of the Invoke-AI server version v5.0.1 allows unauthenticated attackers to cause excessive resource consumption. The server fails to handle excessive characters appended to the end of multipart boundaries...

PYSEC-2026-1395 FastChat Denial of Service vulnerability

A Denial of Service DoS vulnerability exists in the file upload feature of lm-sys/fastchat version 0.2.36. The vulnerability is due to improper handling of form-data with a large filename in the file upload request. An attacker can exploit this by sending a payload with an excessively large...

PYSEC-2026-1466 InvokeAI has Denial of Service (DoS) vulnerability in `/api/v1/images/upload`

A Denial of Service DoS vulnerability in the multipart request boundary processing mechanism of the Invoke-AI server version v5.0.1 allows unauthenticated attackers to cause excessive resource consumption. The server fails to handle excessive characters appended to the end of multipart boundaries...

copyparty renders unsanitized filenames as HTML when user uploads empty files

SummaryA DOM-Based XSS was discovered in copyparty, a portable fileserver. The vulnerability is considered low-risk. DetailsBy handing someone a maliciously-named file, and then tricking them into dragging the file into copyparty's Web-UI, an attacker could execute arbitrary javascript with the...

Label Studio allows Cross-Site Scripting (XSS) via GET request to `/projects/upload-example` endpoint

DescriptionLabel Studio's /projects/upload-example endpoint allows injection of arbitrary HTML through a GET request with an appropriately crafted labelconfig query parameter. By crafting a specially formatted XML label config with inline task data containing malicious HTML/JavaScript, an attacke...

CKAN has an XSS vector in user uploaded images in group/org and user profiles

ImpactUsing a specially crafted file, a user could potentially upload a file containing code that when executed could send arbitrary requests to the server. If that file was opened by an administrator, it could lead to escalation of privileges of the original submitter or other malicious actions...

PYSEC-2026-1504 Label Studio allows Cross-Site Scripting (XSS) via GET request to `/projects/upload-example` endpoint

Description Label Studio's /projects/upload-example endpoint allows injection of arbitrary HTML through a GET request with an appropriately crafted labelconfig query parameter. By crafting a specially formatted XML label config with inline task data containing malicious HTML/JavaScript, an attack...

PYSEC-2026-1666 Mobile Security Framework (MobSF) Stored Cross-Site Scripting Vulnerability in "Diff or Compare" Functionality

Summary The application allows users to upload files with scripts in the filename parameter. As a result, a malicious user can upload a script file to the system. When users in the application use the "Diff or Compare" functionality, they are affected by a Stored Cross-Site Scripting vulnerabilit...

Mobile Security Framework (MobSF) Stored Cross-Site Scripting Vulnerability in "Diff or Compare" Functionality

SummaryThe application allows users to upload files with scripts in the filename parameter. As a result, a malicious user can upload a script file to the system. When users in the application use the "Diff or Compare" functionality, they are affected by a Stored Cross-Site Scripting vulnerability...

Synapse allows unsupported content types to lead to memory exhaustion

ImpactIn Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. PatchesSynapse 1.120.1 resolves the issue by denying...

libre-chat Path Traversal vulnerability

An issue in the uploaddocuments method of libre-chat v0.0.6 allows attackers to execute a path traversal via supplying a crafted filename in an uploaded file...

PYSEC-2026-1537 libre-chat Path Traversal vulnerability

An issue in the uploaddocuments method of libre-chat v0.0.6 allows attackers to execute a path traversal via supplying a crafted filename in an uploaded file...

Django Filer Unrestricted Upload of File with Dangerous Type

Unrestricted Upload of File with Dangerous Type, Improper Input Validation, Improper Neutralization of Script-Related HTML Tags in a Web Page Basic XSS vulnerability in django CMS Association django Filer allows Input Data Manipulation, Stored XSS.This issue affects django Filer: from 3 before 3....

PYSEC-2026-1298 Django Filer Unrestricted Upload of File with Dangerous Type

Unrestricted Upload of File with Dangerous Type, Improper Input Validation, Improper Neutralization of Script-Related HTML Tags in a Web Page Basic XSS vulnerability in django CMS Association django Filer allows Input Data Manipulation, Stored XSS.This issue affects django Filer: from 3 before 3....