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CVE-2026-77407

Vulnerability in github.com/rabbitmq/amqp091-go (CVE-2026-77407)

Summary

Vulnerability in github.com/rabbitmq/amqp091-go (CVE-2026-77407). Risk of unauthorized operations or information disclosure. Exploitable via Connection.Config.SASL. Mitigation: upgrade to 1.13.0 or later.

Original description

The description as published by the source.

Summary

An information disclosure vulnerability exists in the AMQP client implementation's authentication handling configuration. Following a successful connection handshake, the Connection.Config.SASL field stores the Authentication implementation state used to establish the session.

For standard PLAIN authentication, this state utilizes the PlainAuth struct, which defines both Username and Password as publicly exported, plaintext string fields. Because this sensitive data is retained permanently in-memory within an exported field structure, any peripheral code, internal package, reflective logger, dependency, or automated debugging utility with access to the core *Connection object can read and expose the raw credentials.

Vulnerability Details

Mechanism

The vulnerability stems from the structural design of the configuration storage used during and after the AMQP handshake:

// auth.go:21-23
type PlainAuth struct {
    Username string
    Password string  // exported plaintext
}

When an application initializes a connection, the PlainAuth object is deeply nested inside the configuration structure (Connection.Config). Even after the handshake concludes and authentication is complete, this structure persists natively in-memory for the duration of the network connection's lifecycle.

Because Password is an exported string field, standard automated inspection mechanisms can read its value without restriction.

Affected Code P…

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-77407 has been found in github.com/rabbitmq/amqp091-go.
Attackers can target a specific entry point like Connection.Config.SASL over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade github.com/rabbitmq/amqp091-go to 1.13.0 or later.
If unsure, ask your IT team or search "github.com/rabbitmq/amqp091-go CVE-2026-77407" on the vendor's site.

CVE-2026-77407 (github.com/rabbitmq/amqp091-go) — CWE-316
Attack surface: Connection.Config.SASL / Authentication / PLAIN / PlainAuth
Patched: 1.13.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-316) exists in github.com/rabbitmq/amqp091-go. Attackers reach the vulnerable code path via Connection.Config.SASL.

📍 Affected scope

Check the vendor advisory for the affected versions of github.com/rabbitmq/amqp091-go. Attack surface: Connection.Config.SASL / Authentication / PLAIN / PlainAuth.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 1.13.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/rabbitmq/amqp091-go' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'github.com/rabbitmq/amqp091-go' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で github.com/rabbitmq/amqp091-go を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade github.com/rabbitmq/amqp091-go to 1.13.0

    ステージング環境で 1.13.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

go github.com/rabbitmq/amqp091-go
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.13.0"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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