CVE-2026-43968

Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in ninenines cowlib allows SSE event splitting and injection via unvalidated field values. cowsse:event/1 in cowlib guards the id and event fields against \n but not against bare \r, and the internal prefixlines/2 function...

EEF-CVE-2026-43968 CR Injection in SSE Encoder Enables Event Splitting via cow_sse:event/1

Summary Improper Neutralization of CRLF Sequences 'CRLF Injection' vulnerability in ninenines cowlib allows SSE event splitting and injection via unvalidated field values. cow\sse:event/1 in cowlib guards the id and event fields against \n but not against bare \r, and the internal prefix\lines/2...

PT-2026-39726

Name of the Vulnerable Software and Affected Versions cowlib versions 2.6.0 and later Description Improper Neutralization of CRLF Sequences CRLF Injection allows SSE event splitting and injection through unvalidated field values. The cow sse:event/1 function guards the id and event fields against...

Permissive Cross-domain Policy with Untrusted Domains

Overview @yoda.digital/gitlab-mcp-server is a GitLab MCP Server - A Model Context Protocol server for GitLab integration Affected versions of this package are vulnerable to Permissive Cross-domain Policy with Untrusted Domains via the SSE HTTP transport when USESSE=true is set, which lacks...

NPM: eventsource-encoder vulnerable to SSE event injection via unsanitized `event` and `id` fields

NPM: eventsource-encoder vulnerable to SSE event injection via unsanitized event and id fields vulnerability discovered by ? in WordPress Npm eventsource-encoder versions = 1.0.1...

GHSA-M9G3-3G99-MHPX eventsource-encoder vulnerable to SSE event injection via unsanitized `event` and `id` fields

Summary eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject arbitrary Server-Sent Events line terminators \n, \r, or \r\n and thereby forge additional SSE fields or entire messages on the...

eventsource-encoder vulnerable to SSE event injection via unsanitized `event` and `id` fields

Summary eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject arbitrary Server-Sent Events line terminators \n, \r, or \r\n and thereby forge additional SSE fields or entire messages on the...

PT-2026-39241

Name of the Vulnerable Software and Affected Versions eventsource-encoder versions prior to 1.0.2 Description The software fails to sanitize the event and id fields of an EventSourceMessage before serialization in the encodeMessage function. An attacker who controls these fields can inject...

GHSA-84HM-WFH8-C5PG sse-channel: SSE Injection via unsanitized event fields

Impact Implementations that allows user-provided values to be passed to event, retry or id fields would be susceptible to event spoofing, where an attacker could inject arbitrary messages into the stream. - Event Spoofing: Attacker can inject arbitrary SSE events into the stream - Client-side...

PT-2026-37313

Name of the Vulnerable Software and Affected Versions sse-channel versions prior to 4.0.1 Description Implementations that allow user-provided values to be passed to the event, retry, or id fields are susceptible to event spoofing. This allows an attacker to inject arbitrary Server-Sent Events SS...

Security Bulletin: Multiple Vulnerabilities in IBM CloudPak for AIOps

Summary Multiple vulnerabilities were addressed in IBM Cloud Pak for AIOps version 4.13.1 Vulnerability Details CVEID:CVE-2026-22737 DESCRIPTION: Use of Java scripting engine enabled e.g. JRuby, Jython template views in Spring MVC and Spring WebFlux applications can result in disclosure of conten...

Security Bulletin: Due to use of spring-web-6.2.16.jar, IBM Sterling Connect:Direct Web Services is affected by stream corruption issue when using Server-Sent Events (SSE).

Summary spring-web-6.2.16.jar is used by IBM Sterling Connect:Direct Web Services CVE-2026-22735. Vulnerability Details CVEID:CVE-2026-22735 DESCRIPTION: Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events SSE. This issue affects Spring Foundation...

CVE-2026-40576

excel-mcp-server is a Model Context Protocol server for Excel file manipulation. A path traversal vulnerability exists in excel-mcp-server versions up to and including 0.1.7. When running in SSE or Streamable-HTTP transport mode the documented way to use this server remotely, an unauthenticated...

Injection

@nestjs/core is vulnerable to Injection. The vulnerability is due to unsanitized interpolation of user-controlled fields into Server-Sent Events output, which allows an attacker to inject arbitrary events, spoof event types, and manipulate the event stream...

GHSA-J98M-W3XP-9F56 excel-mcp-server has a Path Traversal issue

Summary A path traversal vulnerability exists in excel-mcp-server versions up to and including 0.1.7. When running in SSE or Streamable-HTTP transport mode the documented way to use this server remotely, an unauthenticated attacker on the network can read, write, and overwrite arbitrary files on...

PT-2026-33225

Name of the Vulnerable Software and Affected Versions excel-mcp-server versions prior to 0.1.8 Description A path traversal issue exists in excel-mcp-server when operating in SSE or Streamable-HTTP transport modes. An unauthenticated network attacker can read, write, and overwrite arbitrary files...

CVE-2026-39889

PraisonAI's A2U event stream server exposes all agent activity without authentication prior to version 4.5.115. The create_a2u_routes() function registers endpoints /a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health with no auth checks, enabling unauthenti...

PraisonAI Has Unauthenticated SSE Event Stream that Exposes All Agent Activity in A2U Server

The A2U Agent-to-User event stream server in PraisonAI exposes all agent activity without authentication. This is a separate component from the gateway server fixed in CVE-2026-34952. The createa2uroutes function registers the following endpoints with NO authentication checks: - GET /a2u/info —...

EUVD-2026-20636

PraisonAI Has Unauthenticated SSE Event Stream that Exposes All Agent Activity in A2U Server...

CVE-2026-35515

A flaw was found in Nest, a framework for building Node.js server-side applications. An attacker can exploit a vulnerability in the SseStream.transform function by injecting newline characters into message.type and message.id fields. This allows the attacker to inject arbitrary Server-Sent Events...