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CVE-2026-27446— Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation

Quick assessment

Affected
Apache Software Foundation Apache Artemis
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache ActiveMQ Artemis和Apache Artemis都是美国阿帕奇（Apache）基金会的产品。Apache ActiveMQ Artemis是一个高性能的开源消息代理。Apache Artemis是一个消息代理软件。 Apache Artemis 2.50.0至2.51.0版本和Apache ActiveMQ Artemis 2.11.0至2.44.0版本存在安全漏洞，该漏洞源于关键功能缺少身份验证，可能导致未经身份验证的远程攻击者强制目标代理建立到攻击者控制的恶意代理的出站Co

CVSS 9.3 · Critical EPSS 1.18% · P67

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache ActiveMQ Artemis 2.11.0≤ 2.44.0 affected
Apache Software Foundation Apache Artemis 2.50.0≤ 2.51.0 affected
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I. Basic Information for CVE-2026-27446

Vulnerability Information
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Vulnerability Title
Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation
Source: CVE Program / CVE List V5
Vulnerability Description
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 of this vulnerability. - Implement and deploy a Core interceptor to deny all Core downstream federation connect packets. Such packets have a type of (int) -16 or (byte) 0xfffffff0. Documentation for interceptors is available at  https://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html .
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Apache ActiveMQ Artemis和Apache Artemis 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache ActiveMQ Artemis和Apache Artemis都是美国阿帕奇（Apache）基金会的产品。Apache ActiveMQ Artemis是一个高性能的开源消息代理。Apache Artemis是一个消息代理软件。 Apache Artemis 2.50.0至2.51.0版本和Apache ActiveMQ Artemis 2.11.0至2.44.0版本存在安全漏洞，该漏洞源于关键功能缺少身份验证，可能导致未经身份验证的远程攻击者强制目标代理建立到攻击者控制的恶意代理的出站Co
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Artemis 2.50.0 ~ 2.51.0 -
Apache Software Foundation Apache ActiveMQ Artemis 2.11.0 ~ 2.44.0 -

II. Public POCs for CVE-2026-27446

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III. Intelligence Information for CVE-2026-27446

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IV. Related Vulnerabilities

Same product: Apache Artemis
Same vendor: Apache Software Foundation
Same weakness: CWE-306