CVE-2026-33439-Python-PoC

CVE-2026-33439 Python PoC Standalone Python proof of concept for the OpenAM pre-authentication remote code execution vulnerability in jato.clientSession deserialization. The embedded shaded Click/Xalan gadget reads a shell command from the cmd HTTP header and returns its output in the HTTP...

CVE-2026-116686

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

Model Context Protocol Python SDK: Client Fetched Server-chosen $ref URLs While Validating Tool Results Against Output S

Summary In affected versions, when a connected MCP server declared an "outputSchema" for a tool, the SDK's client validated each "calltool" result with "jsonschema"'s default resolver, which fetches any "$ref" it cannot resolve locally by opening the URL. A server could therefore put an "http://"...

GHSA-RWRF-2PQF-9J8J Model Context Protocol Python SDK: Client fetched server-chosen $ref URLs while validating tool results against output schemas

Summary In affected versions, when a connected MCP server declared an outputSchema for a tool, the SDK's client validated each calltool result with jsonschema's default resolver, which fetches any $ref it cannot resolve locally by opening the URL. A server could therefore put an http://, https://...

CVE-2026-116686

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

CVE-2026-116686

The Model Context Protocol Python SDK contains a vulnerability in versions 1.10.0 through 1.30.0 and 2.2.0 . The ClientSession, ClientSessionGroup, and Client tool calls use the default resolver in jsonschema to validate server-declared outputSchema documents. This allows a server to provide an u...

EUVD-2026-111366

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

CVE-2026-116686 Model Context Protocol Python SDK: Client fetched server-chosen $ref URLs while validating tool results against output schemas

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

CVE-2026-116686 Model Context Protocol Python SDK: Client fetched server-chosen $ref URLs while validating tool results against output schemas

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

CVE-2026-116686 Model Context Protocol Python SDK: Client fetched server-chosen $ref URLs while validating tool results against output schemas

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

CVE-2026-116686

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

Model Context Protocol MCP Python SDK server request forgery vulnerability

Versions 1.10.0 through 1.30.0 and 2.0.0 through 2.2.0 of the Model Context Protocol MCP Python SDK contain a server-side request forgery vulnerability. This vulnerability arises because ClientSession, ClientSessionGroup, and Client invoke the default JSON schema parser to validate the outputSche...

CVE-2026-116686: Server-Side Request Forgery (SSRF)

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing...

PT-2026-127755

Summary In affected versions, when a connected MCP server declared an outputSchema for a tool, the SDK's client validated each call tool result with jsonschema's default resolver, which fetches any $ref it cannot resolve locally by opening the URL. A server could therefore put an http://, https:/...

CVE-2026-94419

The wolfSSL library (releases v5.3.0 through v5.9.2 ) is vulnerable to client session cache reference poisoning. Due to missing checks on the process-global SessionCache , an attacker can overwrite a client-side entry by providing a matching TLS 1.2 session ID sent in clear. This allows an attack...

Exploit for Deserialization of Untrusted Data in Openidentityplatform Openam

CVE-2026-33439 Python PoC Standalone Python proof of concept...

OpenAM code-related vulnerabilities

OpenAM is an integrated access management solution developed by the OpenAM Consortium. It provides authentication, authorization, and federation features. Versions of OpenAM prior to 16.0.6 have code vulnerabilities due to an insecure Java deserialization issue with the jato.clientSession...

PT-2026-30917

Name of the Vulnerable Software and Affected Versions OpenAM versions prior to 16.0.6 Description Open Access Management OpenAM is an access management solution. An unauthenticated attacker can achieve arbitrary command execution on the server through unsafe Java deserialization. This occurs when...

BlackSheep's ClientSession is vulnerable to CRLF injection

Impact The HTTP Client implementation in BlackSheep is vulnerable to CRLF injection. Missing headers validation makes it possible for an attacker to modify the HTTP requests e.g. insert a new header or even create a new HTTP request. Exploitation requires developers to pass unsanitized user input...

CVE-2026-22779

Summary of public details (CVE-2026-22779) : BlackSheep, a Python asynchronous web framework, has a vulnerable HTTP Client implementation prior to version 2.4.6. The root cause is missing validation of headers, enabling CRLF injection that can modify existing HTTP requests or create new ones when...