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...

PYSEC-2026-1217 BBOT's gitlab.py exposes globally configured "gitlab" API key

Summary bbot's gitlab.py sends the user's "gitlab" API key to on-premise GitLab instances. If a user has configured a gitlab.com API key using this mechanism, it may be leaked to an attacker-controlled server. Impact A user with a "gitlab" API key configured who uses bbot to scan a malicious...

PYSEC-2026-1846 python-ldap is Vulnerable to Improper Encoding or Escaping of Output and Improper Null Termination

Summary ldap.dn.escapednchars escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP...

PYSEC-2026-1847 python-ldap has sanitization bypass in ldap.filter.escape_filter_chars

Summary The sanitization method ldap.filter.escapefilterchars can be tricked to skip escaping of special characters when a crafted list or dict is supplied as the assertionvalue parameter, and the non-default escapemode=1 is configured. Details The method ldap.filter.escapefilterchars supports 3...

PYSEC-2026-1690 Nautobot Single Source of Truth (SSoT) has an unauthenticated ServiceNow configuration URL

The servicenow config URL is using a generic django View with no authentication. URL: /plugins/ssot/servicenow/config/ Impact What kind of vulnerability is it? Who is impacted? An Unauthenticated attacker could access this page to view the Service Now public instance name e.g...

PYSEC-2026-1930 Hugging Face Smolagents XPath injection vulnerability in the search_item_ctrl_f function

Hugging Face Smolagents version 1.20.0 contains an XPath injection vulnerability in the searchitemctrlf function located in src/smolagents/visionwebbrowser.py. The function constructs an XPath query by directly concatenating user-supplied input into the XPath expression without proper sanitizatio...

PYSEC-2026-1453 Home Assistant has Stored XSS vulnerability in Energy dashboard from Energy Entity Name

Summary An authenticated party can add a malicious name to the Energy entity, allowing for Cross-Site Scripting attacks against anyone who can see the Energy dashboard, when they hover over any information point The blue bar in the picture below An alternative, and more impactful scenario, is tha...

PYSEC-2026-1612 Synapse's invalid device keys degrade federation functionality

Impact Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. Patches Patched in Synapse 1.138.3, 1.138.4,...

PYSEC-2026-1932 Python Social Auth - Django has unsafe account association

Impact Upon authentication, the user could be associated by e-mail even if the associatebyemail pipeline was not included. This could lead to account compromise when a third-party authentication service does not validate provided e-mail addresses or doesn't require unique e-mail addresses. Patche...

PYSEC-2026-1203 Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Summary Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes. During verification, Authlib decodes and parses the full input before it is rejected, driving...

PYSEC-2026-1216 BBOT's git_clone.py can expose users' GitHub API keys to an attacker-controlled webserver

Summary Due to unsafe URL handling, bbot's gitclone.py can be made to leak a user's github.com API key to an attacker-controlled webserver. Impact A user who has placed their github.com API key in the configuration for any of the following modules: githubcodesearch githubworkflows gitlab gitclone...

PYSEC-2026-1816 pyLoad CNL and captcha handlers allow Code Injection via unsanitized parameters

Summary pyLoad web interface contained insufficient input validation in both the Captcha script endpoint and the Click'N'Load CNL Blueprint. This flaw allowed untrusted user input to be processed unsafely, which could be exploited by an attacker to inject arbitrary content into the web UI or...

PYSEC-2026-1603 Mammoth is vulnerable to Directory Traversal

Versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth before 1.11.0; versions of the package org.zwobble.mammoth:mammoth before 1.11.0 are vulnerable to Directory Traversal due to the lack of...

PYSEC-2026-1556 llama-index has Insecure Temporary File

The llamaindex library version 0.12.33 sets the NLTK data directory to a subdirectory of the codebase by default, which is world-writable in multi-user environments. This configuration allows local users to overwrite, delete, or corrupt NLTK data files, leading to potential denial of service, dat...

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-2026-1202 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...

PYSEC-2026-1699 NiceGUI has a Reflected XSS

Summary A Cross-Site Scripting XSS risk exists in NiceGUI when developers render unescaped user input into the DOM using ui.html. Before version 3.0, NiceGUI does not enforce HTML or JavaScript sanitization, so applications that directly combine components like ui.input with ui.html without...

PYSEC-2026-1632 mkdocs-include-markdown-plugin susceptible to unvalidated input colliding with substitution placeholders

Impact CWE-20: Improper Input Validation Low impact Patches Patched in v7.1.8 commit https://github.com/mondeja/mkdocs-include-markdown-plugin/commit/7466d67aa0de8ffbc427204ad2475fed07678915 Workarounds No...

PYSEC-2026-1520 LangChain Text Splitters is vulnerable to XML External Entity (XXE) attacks due to unsafe XSLT parsing

The HTMLSectionSplitter class in langchain-text-splitters is vulnerable to XML External Entity XXE attacks due to unsafe XSLT parsing. This vulnerability arises because the class allows the use of arbitrary XSLT stylesheets, which are parsed using lxml.etree.parse and lxml.etree.XSLT without any...

PYSEC-2026-1553 Litestar X-Forwarded-For Header Spoofing Vulnerability Enables Rate Limit Evasion

While testing Litestar's RateLimitMiddleware, I discovered that rate limits can be completely bypassed by manipulating the X-Forwarded-For header. This renders IP-based rate limiting ineffective against determined attackers. The Problem Litestar's RateLimitMiddleware uses cachekeyfromrequest to...

PYSEC-2026-1296 Django vulnerable to partial directory traversal via archives

An issue was discovered in Django 4.2 before 4.2.25, 5.1 before 5.1.13, and 5.2 before 5.2.7. The django.utils.archive.extract function, used by the "startapp --template" and "startproject --template" commands, allows partial directory traversal via an archive with file paths sharing a common...

PYSEC-2026-1255 clearml is vulnerable to Path Traversal through its `safe_extract` function

A vulnerability in clearml versions before 2.0.2 allows for path traversal due to improper handling of symbolic and hard links in the safeextract function. This flaw can lead to arbitrary file writes outside the intended directory, potentially resulting in remote code execution if critical files...

PYSEC-2026-2011 vLLM is vulnerable to Server-Side Request Forgery (SSRF) through `MediaConnector` class

Summary A Server-Side Request Forgery SSRF vulnerability exists in the MediaConnector class within the vLLM project's multimodal feature set. The loadfromurl and loadfromurlasync methods fetch and process media from user-provided URLs without adequate restrictions on the target hosts. This allows...

PYSEC-2026-2071 ZenML is vulnerable to Path Traversal through its `PathMaterializer` class

ZenML version 0.83.1 is affected by a path traversal vulnerability in the PathMaterializer class. The load function uses ispathwithindirectory to validate files during data.tar.gz extraction, which fails to effectively detect symbolic and hard links. This vulnerability can lead to arbitrary file...

PYSEC-2026-1935 SPDK is vulnerable to buffer overflow in the NVMe-oF target component

Storage Performance Development Kit SPDK 25.05 is vulnerable to Buffer Overflow in the NVMe-oF target component in SPDK - lib/nvmf...

PYSEC-2026-1288 DataChain Vulnerable to Deserialization of Untrusted Data from Environment Variables

The DataChain library reads serialized objects from environment variables such as DATACHAINMETASTORE and DATACHAINWAREHOUSE in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads...

PYSEC-2026-1854 python-socketio vulnerable to arbitrary Python code execution (RCE) through malicious pickle deserialization in certain multi-server deployments

Summary A remote code execution vulnerability in python-socketio versions prior to 5.14.0 allows attackers to execute arbitrary Python code through malicious pickle deserialization in multi-server deployments on which the attacker previously gained access to the message queue that the servers use...

PYSEC-2026-1573 LLaMA Factory's Chat API Contains Critical SSRF and LFI Vulnerabilities

Summary A Server-Side Request Forgery SSRF vulnerability in the chat API allows any authenticated user to force the server to make arbitrary HTTP requests to internal and external networks. This can lead to the exposure of sensitive internal services, reconnaissance of the internal network, or...

PYSEC-2026-2013 vLLM: Resource-Exhaustion (DoS) through Malicious Jinja Template in OpenAI-Compatible Server

Summary A resource-exhaustion denial-of-service vulnerability exists in multiple endpoints of the OpenAI-Compatible Server due to the ability to specify Jinja templates via the chattemplate and chattemplatekwargs parameters. If an attacker can supply these parameters to the API, they can cause a...

PYSEC-2026-2026 vLLM is vulnerable to timing attack at bearer auth

Summary The API key support in vLLM performed validation using a method that was vulnerable to a timing attack. This could potentially allow an attacker to discover a valid API key using an approach more efficient than brute force. Details...

PYSEC-2026-1795 pip's fallback tar extraction doesn't check symbolic links point to extraction directory

When extracting a tar archive pip may not check symbolic links point into the extraction directory if the tarfile module doesn't implement PEP 706. Note that upgrading pip to a "fixed" version for this vulnerability doesn't fix all known vulnerabilities that are remediated by using a Python versi...

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...

PYSEC-2026-1635 ml-logger file handler allows reading arbitrary files

A security flaw has been discovered in geyang ml-logger up to acf255bade5be6ad88d90735c8367b28cbe3a743. Affected by this issue is the function streamhandler of the file mllogger/server.py of the component File Handler. Performing manipulation of the argument key results in information disclosure...

PYSEC-2026-1200 Authlib: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)

Summary Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical header for example, bork or cnf that strict verifiers reject but Authlib accepts. In...

PYSEC-2026-1619 mcp-kubernetes-server has a Command Injection vulnerability

mcp-kubernetes-server does not correctly enforce the --disable-write / --disable-delete protections when commands are chained. The server only inspects the first token to decide whether an operation is write/delete, which allows a read-like command to be followed by a write action using shell...

PYSEC-2026-1980 Hugging Face Transformers vulnerable to Regular Expression Denial of Service (ReDoS) in the AdamWeightDecay optimizer

The huggingface/transformers library, versions prior to 4.53.0, is vulnerable to Regular Expression Denial of Service ReDoS in the AdamWeightDecay optimizer. The vulnerability arises from the douseweightdecay method, which processes user-controlled regular expressions in the includeinweightdecay...

PYSEC-2026-1633 ml-logger deserialization vulnerability

A vulnerability was determined in geyang ml-logger 0.10.36 and prior. Affected is the function loghandler of the file mllogger/server.py of the component Ping Handler. This manipulation of the argument data causes deserialization. It is possible to initiate the attack remotely. The exploit has be...

PYSEC-2026-1562 llama-index-core insecurely handles temporary files

The llama-index-core package, up to version 0.12.44, contains a vulnerability in the getcachedir function where a predictable, hardcoded directory path /tmp/llamaindex is used on Linux systems without proper security controls. This vulnerability allows attackers on multi-user systems to steal...

PYSEC-2026-1988 Hugging Face Transformers library has Regular Expression Denial of Service

A Regular Expression Denial of Service ReDoS vulnerability was discovered in the Hugging Face Transformers library, specifically within the normalizenumbers method of the EnglishNormalizer class. This vulnerability affects versions up to 4.52.4 and is fixed in version 4.53.0. The issue arises fro...

PYSEC-2026-1634 ml-logger has path traversal in the file argument

A vulnerability was identified in geyang ml-logger 0.10.36 and prior. Affected by this vulnerability is the function loghandler of the file mllogger/server.py. Such manipulation of the argument File leads to path traversal. It is possible to launch the attack remotely. The exploit is publicly...

PYSEC-2026-1571 Llama Stack could potentially allow for remote code execution

Llama Stack prior to version v0.2.20 accepted unverified parameters in the resolveastbytype function which could potentially allow for remote code execution...

PYSEC-2026-1378 Flask App Builder has an Authentication Bypass vulnerability when using non AUTH_DB methods

Impact When Flask-AppBuilder is configured to use OAuth, LDAP, or other non-database authentication methods, the password reset endpoint remains registered and accessible, despite not being displayed in the user interface. This allows an enabled user to reset their password and be able to create...

PYSEC-2026-1343 Fides Webserver API is Vulnerable to OAuth Client Privilege Escalation

Summary The OAuth client creation and update endpoints of the Fides Webserver API do not properly authorize scope assignment. This allows highly privileged users with client:create or client:update permissions to escalate their privileges to owner-level. Details When creating or updating OAuth...

PYSEC-2026-1813 PyInstaller has local privilege escalation vulnerability

Impact Due to a special entry being appended to sys.path during the bootstrap process of a PyInstaller-frozen application, and due to the bootstrap script attempting to load an optional module for bytecode decryption while this entry is still present in sys.path, an application built with...

PYSEC-2026-1279 copyparty: Sharing a single file does not fully restrict access to other files in source folder

There was a missing permission-check in the shares feature the shr global-option. When a share is created for just one file inside a folder, it was possible to access the other files inside that folder by guessing the filenames. It was not possible to descend into subdirectories in this manner;...

PYSEC-2026-1919 SGLang Remote Code Execution Vulnerability via Unsafe Deserialization in update_weights_from_tensor

A security flaw has been discovered in lmsys sglang 0.4.6. Affected by this vulnerability is the function main of the file /updateweightsfromtensor. The manipulation of the argument serializednamedtensors results in deserialization. The attack can be launched remotely. The exploit has been releas...

PYSEC-2026-1460 Indico may disclose unauthorized user details access via legacy API

Impact A legacy API to retrieve user details could be misused to retrieve profile details of other users without having admin permissions due to a broken access check. Patches You should to update to Indico 3.3.8 as soon as possible. See the docs for instructions on how to update. Workarounds It ...

PYSEC-2026-1712 OctoPrint is Vulnerable to RCE Attacks via Unsanitized Filename in File Upload

Impact OctoPrint versions up until and including 1.11.2 contain a vulnerability that allows an authenticated attacker to upload a file under a specially crafted filename that will allow arbitrary command execution if said filename becomes included in a command defined in a system event handler an...

PYSEC-2026-1463 Infrahub: Deleted and expired API tokens can still authenticate

Impact A bug in the authentication logic will cause API tokens that were deleted and/or expired to be considered valid. This means that any API token that is associated with an active user account can authenticate successfully. Patches This issue is fixed in versions 1.3.9 and 1.4.5 Workarounds...

PYSEC-2026-1461 Indico vulnerable to Cross-Site Scripting via LaTeX math code

Impact There is a Cross-Site-Scripting vulnerability when rendering LaTeX math code in contribution or abstract descriptions. Patches You should to update to Indico 3.3.8 as soon as possible. See the docs for instructions on how to update. Workarounds Only let trustworthy users create content on...