CVE-2026-67448 Mailpit: WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689)

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures...

CVE-2026-69207

Hono’s built-in CORS middleware (hono/cors) is vulnerable to a ReDoS in the Access-Control-Request-Headers parsing during preflight requests when allowHeaders is unset/empty. The regex-based parser can backtrack quadratically with long whitespace, potentially causing seconds of CPU usage per pref...

Regular Expression Denial of Service (ReDoS)

Overview org.webjars.npm:hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS in the cors middleware during the parsing of the Access-Control-Request-Headers header via a regular expression with quadratic...

Neo4j Cypher MCP server is vulnerable to DNS rebinding

ImpactDNS rebinding vulnerability in Neo4j Cypher MCP server allows malicious websites to bypass Same-Origin Policy protections and execute unauthorised tool invocations against locally running Neo4j MCP instances. The attack relies on the user being enticed to visit a malicious website and spend...

GHSA-CW3J-28QQ-X3XH Duplicate Advisory: Hono vulnerable to Vary Header Injection leading to potential CORS Bypass

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references. Original Description Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the...

Duplicate Advisory: Hono vulnerable to Vary Header Injection leading to potential CORS Bypass

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references. Original Description Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the...

PT-2026-105504

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references. Original Description Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the...

CVE-2025-71381

Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary...

CVE-2025-71381 Hono - Vary Header Injection in CORS Middleware

Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary...

CVE-2025-71381

Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary...

CVE-2025-71381: Improper Neutralization of CRLF Sequences in HTTP Headers

Hono before 4.10.2 fixed in 4.10.3 contains a flaw in its CORS middleware: when the origin is not set to "", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary...

CVE-2026-54290

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin the default wildcard, the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make...

CVE-2026-54290 Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin the default wildcard, the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make...

CVE-2026-54290

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin the default wildcard, the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make...

CVE-2026-54290: Permissive Cross-domain Policy with Untrusted Domains

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin the default wildcard, the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make...

Permissive Cross-domain Policy with Untrusted Domains

Overview org.webjars.npm:hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to Permissive Cross-domain Policy with Untrusted Domains in the CORS middleware. An attacker can access sensitive information and perform unauthorized actions by sending...

GHSA-98CP-84M9-Q3QP free5GC PCF: Memory Leak via CORS Middleware Registration in HTTP Handler Leads to Denial of Service

Summary A memory leak vulnerability in the free5GC PCF Policy Control Function allows any unauthenticated attacker with network access to the PCF SBI interface to cause uncontrolled memory growth by sending repeated HTTP requests to the OAM endpoint. The root cause is a router.Use call inside an...

free5GC PCF: Memory Leak via CORS Middleware Registration in HTTP Handler Leads to Denial of Service

Summary A memory leak vulnerability in the free5GC PCF Policy Control Function allows any unauthenticated attacker with network access to the PCF SBI interface to cause uncontrolled memory growth by sending repeated HTTP requests to the OAM endpoint. The root cause is a router.Use call inside an...

CVE-2026-41135 free5GC PCF: Memory Leak via CORS Middleware Registration in HTTP Handler Leads to Denial of Service

free5GC UDR is the Policy Control Function PCF for free5GC, an an open-source project for 5th generation 5G mobile core networks. A memory leak vulnerability in versions prior to 1.4.3 allows any unauthenticated attacker with network access to the PCF SBI interface to cause uncontrolled memory...

CVE-2026-41135

CVE-2026-41135 affects free5GC UDR (PCF) prior to version 1.4.3. The root cause is a faulty router.Use() call inside an HTTP handler that registers a new CORS middleware on every incoming request, causing the Gin router to permanently grow its handler chain. This leads to progressive memory exhau...