---
id: "CVE-2026-77404"
kind: "vulnerability"
aliases: ["CVE-2026-77404", "GHSA-465g-fh3v-9jw4", "GO-2026-6493"]
title: "RabbitMQ amqp091-go: Connection Configuration Overwrite via Unsanitized TLS Path Parameter Injection in github.com/rabbitmq/amqp091-go"
severity: "high"
cvss: 8.7
epss: 0.00098
exploited: false
status: "open"
category: "package"
products: [{"name": "github.com/rabbitmq/amqp091-go", "fixed": ["1.13.0"], "affected": "< 1.13.0", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["amqp", "go", "package", "rabbitmq"]
not_affected_if: ["default-config"]
published_at: "2026-09-16T15:17:47+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T21:44:01+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6493", "first_seen_at": "2026-10-23T19:13:08+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-77404", "first_seen_at": "2026-10-23T19:13:43+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77404", "first_seen_at": "2026-10-23T19:35:23+00:00"}]
---

# RabbitMQ amqp091-go: Connection Configuration Overwrite via Unsanitized TLS Path Parameter Injection in github.com/rabbitmq/amqp091-go

The amqp091-go Go client builds AMQPS connection URIs by concatenating TLS file paths and server name into the query string without encoding them. If an application passes such a value into the URI and later parses it back with ParseURI, extra ampersand or equals characters can add or overwrite connection options.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:github.com/rabbitmq/amqp091-go affected < 1.13.0 fixed 1.13.0

## Fix

Upgrade github.com/rabbitmq/amqp091-go to 1.13.0 or later.

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6493
- 2026-10-23T19:13:43+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-77404
- 2026-10-23T19:35:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-77404

## From the sources

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, URI.String in uri.go concatenates CertFile, KeyFile, CACertFile, and ServerName values directly into an AMQPS query string instead of encoding them as URL query parameters with url.Values. If an application accepts a TLS asset path containing ampersand or equals delimiters and later reparses the serialized URI with ParseURI, the embedded delimiters can create or overwrite connection options, including paths to TLS certificate, key, or CA files. This can corrupt connection configuration or select unintended local cryptographic assets. This issue is fixed in version 1.13.0.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_