PYSEC-2026-1762 Arbitrary Code Execution in pdfminer.six via Crafted PDF Input

Summary pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The CMapDB.loaddata function in pdfminer.six uses pickle.loads to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in th...

PYSEC-2026-1729 Open WebUI Affected by an External Model Server (Direct Connections) Code Injection via SSE Events

Summary Open WebUI v0.6.33 and below contains a code injection vulnerability in the Direct Connections feature that allows malicious external model servers to execute arbitrary JavaScript in victim browsers via Server-Sent Event SSE execute events. This leads to authentication token theft, comple...

Starlette vulnerable to O(n^2) DoS via Range header merging in ``starlette.responses.FileResponse``

SummaryAn unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette's FileResponse Range parsing/merging logic. This enables CPU exhaustion per request, causing denial‑of‑service for endpoints serving files e.g., StaticFiles or any use of...

PYSEC-2026-1942 Starlette vulnerable to O(n^2) DoS via Range header merging in ``starlette.responses.FileResponse``

Summary An unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette's FileResponse Range parsing/merging logic. This enables CPU exhaustion per request, causing denial‑of‑service for endpoints serving files e.g., StaticFiles or any use of...

Authlib : JWE zip=DEF decompression bomb enables DoS

SummaryAuthlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. Details- Affected component:...

PYSEC-2026-1202 Authlib : JWE zip=DEF decompression bomb enables DoS

Summary Authlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. Details - Affected component...

reflex-dev/reflex has an Open Redirect vulnerability

MitigationMake sure GITHUBCODESPACESPORTFORWARDINGDOMAIN is not set in a production environment. So the following is correct:assert os.getenv"GITHUBCODESPACESPORTFORWARDINGDOMAIN" is None Vulnerability Description---Vulnerability Overview - When theGET/auth-codespace page loads in a GitHub...

PYSEC-2026-1868 reflex-dev/reflex has an Open Redirect vulnerability

Mitigation Make sure GITHUBCODESPACESPORTFORWARDINGDOMAIN is not set in a production environment. So the following is correct: assert os.getenv"GITHUBCODESPACESPORTFORWARDINGDOMAIN" is None Vulnerability Description --- Vulnerability Overview - When the GET /auth-codespace page loads in a GitHub...

PYSEC-2026-1482 JupyterLab LaTeX typesetter links did not enforce `noopener` attribute

Links generated with LaTeX typesetters in Markdown files and Markdown cells in JupyterLab and Jupyter Notebook did not include the noopener attribute. This is deemed to have no impact on the default installations. Theoretically users of third-party LaTeX-rendering extensions could find themselves...

Picklescan has a missing detection when calling built-in python idlelib.debugobj.ObjectTreeItem

SummaryUsing idlelib.debugobj.ObjectTreeItem.SetText, which is a built-in python library function to execute remote pickle file. DetailsThe attack payload executes in the following steps:First, the attacker craft the payload by calling to idlelib.debugobj.ObjectTreeItem.SetText function in reduce...

PYSEC-2026-1355 Exiv2 has quadratic performance in ICC profile parsing in JpegBase::readMetadata

Impact A denial-of-service was found in Exiv2 version v0.28.5: a quadratic algorithm in the ICC profile parsing code in jpegBase::readMetadata can cause Exiv2 to run for a long time. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of imag...

Exiv2 has quadratic performance in ICC profile parsing in JpegBase::readMetadata

ImpactA denial-of-service was found in Exiv2 version v0.28.5: a quadratic algorithm in the ICC profile parsing code in jpegBase::readMetadata can cause Exiv2 to run for a long time. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image...

PYSEC-2026-1781 Picklescan has a missing detection when calling built-in python idlelib.debugobj.ObjectTreeItem

Summary Using idlelib.debugobj.ObjectTreeItem.SetText, which is a built-in python library function to execute remote pickle file. Details The attack payload executes in the following steps: First, the attacker craft the payload by calling to idlelib.debugobj.ObjectTreeItem.SetText function in...

PYSEC-2026-1608 MaterialX Lack of MTLX Import Depth Limit Leads to DoS (Denial-Of-Service) Via Stack Exhaustion

Summary Nested imports of MaterialX files can lead to a crash via stack memory exhaustion, due to the lack of a limit on the "import chain" depth. Details The MaterialX specification supports importing other files by using XInclude tags. When parsing file imports, recursion is used to process...

MaterialX Lack of MTLX Import Depth Limit Leads to DoS (Denial-Of-Service) Via Stack Exhaustion

SummaryNested imports of MaterialX files can lead to a crash via stack memory exhaustion, due to the lack of a limit on the "import chain" depth. DetailsThe MaterialX specification supports importing other files by using XInclude tags.When parsing file imports, recursion is used to process nested...

MS SWIFT Remote Code Execution via unsafe PyYAML deserialization

DescriptionA Remote Code Execution RCE vulnerability exists in the modelscope/ms-swift project due to unsafe use of yaml.load in combination with vulnerable versions of the PyYAML library ≤ 5.3.1. The issue resides in the tests/run.py script, where a user-supplied YAML configuration file is...

PYSEC-2026-1683 MS SWIFT Remote Code Execution via unsafe PyYAML deserialization

Description A Remote Code Execution RCE vulnerability exists in the modelscope/ms-swift project due to unsafe use of yaml.load in combination with vulnerable versions of the PyYAML library ≤ 5.3.1. The issue resides in the tests/run.py script, where a user-supplied YAML configuration file is...

Skops has Inconsistent Trusted Type Validation that Enables Hidden `operator` Methods Execution

SummaryAn inconsistency in OperatorFuncNode can be exploited to hide the execution of untrusted operator.xxx methods. This can then be used in a code reuse attack to invoke seemingly safe functions and escalate to arbitrary code execution with minimal and misleading trusted types.Note: This repor...

Starlette has possible denial-of-service vector when parsing large files in multipart forms

SummaryWhen parsing a multi-part form with large files greater than the default max spool size starlette will block the main thread to roll the file over to disk. This blocks the event thread which means we can't accept new connections. DetailsPlease see this discussion for details:...

Assemblyline 4 service client vulnerable to Arbitrary Write through path traversal in Client code

Path-Traversal - Arbitrary File Write in Assemblyline Service ClientIMPORTANT: This vulnerability is valid if you decide to use the assemblyline-service-client outside of the normal practice to using Assemblyline in a production environment. In practice, this code should always be executed within...