CVE-2026-84378

HTTPX2 , a next-generation HTTP client for Python, is affected by a quadratic CPU denial-of-service vulnerability in its Server-Sent Events (SSE) parser. Versions from 2.5.0 through 2.10.0 are impacted. The root cause lies in _SSELineDecoder.decode() in src/httpx2/httpx2/_sse.py, which repeatedly...

SUSE CVE-2026-81092

mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.go and SSEServer.ServeHTTP in server/sse.go served any request arriving over a loopback connection regardless of the host it named, and the SSE transport's...

github.com/mark3labs/mcp-go: mcp-go: DNS Rebinding vulnerability due to missing Host header validation

A flaw was found in mcp-go. This component failed to validate the Host header in HTTP requests, specifically within its StreamableHTTPServer and SSEServer transports. A remote attacker could exploit this by using a crafted web page to perform a DNS rebinding attack. This allows the attacker to...

github.com/mark3labs/mcp-go: mcp-go: DNS Rebinding vulnerability due to missing Host header validation

A flaw was found in mcp-go. This component failed to validate the Host header in HTTP requests, specifically within its StreamableHTTPServer and SSEServer transports. A remote attacker could exploit this by using a crafted web page to perform a DNS rebinding attack. This allows the attacker to...

PT-2026-84844

Name of the Vulnerable Software and Affected Versions HTTPX2 versions 2.5.0 through 2.9.0 Description The Server-Sent Events SSE parser in src/httpx2/httpx2/ sse.py repeatedly copies and rescans buffered text within the SSELineDecoder.decode function when an SSE endpoint splits a single...

SUSE CVE-2026-79780

rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host...

CVE-2026-79780

A flaw was found in rclone. The application fails to properly sanitize IBM IAM bearer tokens and Server-Side Encryption with Customer-Provided Keys SSE-C encryption keys during S3 redirect callbacks. This allows credentials to be preserved across scheme or host changes. A remote attacker observin...

CVE-2026-79747: Server-Side Request Forgery (SSRF)

MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, an authenticated non-admin user can register a server pointing at an arbitrary URL and make the hub issue...

CVE-2026-81092 mcp-go before 0.56.0 Missing Host Header Validation Enables DNS Rebinding

mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.go and SSEServer.ServeHTTP in server/sse.go served any request arriving over a loopback connection regardless of the host it named, and the SSE transport's...

EUVD-2026-67147

mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.go and SSEServer.ServeHTTP in server/sse.go served any request arriving over a loopback connection regardless of the host it named, and the SSE transport's...

CVE-2026-81092 mcp-go before 0.56.0 Missing Host Header Validation Enables DNS Rebinding

mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.go and SSEServer.ServeHTTP in server/sse.go served any request arriving over a loopback connection regardless of the host it named, and the SSE transport's...

Security Bulletin: Multiple Vulnerabilities in IBM Concert Software

Summary Multiple vulnerabilities were addressed in IBM Concert Software version 3.0.0 Vulnerability Details CVEID:CVE-2026-26996 DESCRIPTION: minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Versions 10.2.0 and below are vulnerable to Regular...

Spring Framework Server Sent Event stream corruption while rendering fragments

Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events SSE with view fragments. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19...

GHSA-J9F9-W8PJ-32F8 Spring Framework Server Sent Event stream corruption while rendering fragments

Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events SSE with view fragments. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19...

Linux Distros Unpatched Vulnerability : CVE-2026-79780

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved acros...

CVE-2026-53965

The MCP PHP SDK Composer package mcp/sdk is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only...

CVE-2026-53965 MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service

The MCP PHP SDK Composer package mcp/sdk is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only...

CVE-2026-53965 MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service

The MCP PHP SDK Composer package mcp/sdk is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only...

CVE-2026-53965

CVE-2026-53965 affects the MCP PHP SDK (Composer package mcp/sdk), versions 0.5.0 through 0.7.0 . The HttpTransport class's processSSEStream() method appends each 4 KiB read chunk to an in-memory buffer ($this->sseBuffer) with no upper bound ; the buffer is only flushed upon encountering the S...

CVE-2026-45019 Chainlit: SSRF via MCP SSE and streamable-http transports allows unauthenticated internal network access

Chainlit is a Python framework for building production-ready conversational AI applications. From 2.4.0rc0 until 2.12.0, Chainlit deployments with features.mcp.enabled set to true in .chainlit/config.toml expose the POST /mcp endpoint without requiring authentication. For sse and streamable-http...