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CVE-2026-27446 critical CVSS 9.8

Vulnerability in org.apache.activemq:artemis-server (CVE-2026-27446)

Summary

Vulnerability in org.apache.activemq:artemis-server (CVE-2026-27446). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2.52.0 or later.

Original description

The description as published by the source.

Missing Authentication for Critical Function (CWE-306) vulnerability in Apache Artemis, Apache ActiveMQ Artemis. An unauthenticated remote attacker can use the Core protocol to force a target broker to establish an outbound Core federation connection to an attacker-controlled rogue broker. This could potentially result in message injection into any queue and/or message exfiltration from any queue via the rogue broker. This impacts environments that allow both:

  • incoming Core protocol connections from untrusted sources to the broker

  • outgoing Core protocol connections from the broker to untrusted targets

This issue affects:

  • Apache Artemis from 2.50.0 through 2.51.0

  • Apache ActiveMQ Artemis from 2.11.0 through 2.44.0.

Users are recommended to upgrade to Apache Artemis version 2.52.0, which fixes the issue.

The issue can be mitigated by one of the following:

  • Remove Core protocol support from any acceptor receiving connections from untrusted sources. Incoming Core protocol connections are supported by default via the "artemis" acceptor listening on port 61616. See the "protocols" URL parameter configured for the acceptor. An acceptor URL without this parameter supports all protocols by default, including Core.

  • Use two-way SSL (i.e. certificate-based authentication) in order to force every client to present the proper SSL certificate when establishing a connection before any message protocol handshake is attempted. This will prevent unauthenticated exploitation o…

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-2026-27446 has been found in org.apache.activemq:artemis-server.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade org.apache.activemq:artemis-server to 2.52.0 or later.
If unsure, ask your IT team or search "org.apache.activemq:artemis-server CVE-2026-27446" on the vendor's site.

CVE-2026-27446 (org.apache.activemq:artemis-server) — CWE-306 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2.52.0 — 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-306) exists in org.apache.activemq:artemis-server.

📍 Affected scope

Check the vendor advisory for the affected versions of org.apache.activemq:artemis-server.

🔥 Severity

Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 2.52.0.

🛡️ 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. Audit SBOM/dependencies to find affected services.

Response actions

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

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで org.apache.activemq:artemis-server を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade org.apache.activemq:artemis-server to 2.52.0

    ステージング環境で 2.52.0 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

maven org.apache.activemq:artemis-server
[{"type":"ECOSYSTEM","events":[{"introduced":"2.11.0"},{"last_affected":"2.44.0"}]}]
maven org.apache.artemis:artemis-server
[{"type":"ECOSYSTEM","events":[{"introduced":"2.50.0"},{"fixed":"2.52.0"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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