CVE-2026-27446 (GCVE-0-2026-27446)

Vulnerability from cvelistv5 – Published: 2026-03-04 08:48 – Updated: 2026-05-12 12:08
VLAI?
Title
Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation
Summary
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 .
Severity ?
9.3 (Critical)
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
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Credits
Hardik Mehta <mehtahardik@proton.me>
Show details on NVD website
To clipboard 

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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.\\n\\n- 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.\\n\\n- Implement and deploy a Core interceptor to deny all Core downstream federation connect packets. Such packets have a type of (int) -16 or (byte)\\u00a00xfffffff0. Documentation for interceptors is available at\\u00a0 https://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html .\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eMissing 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:\u003c/p\u003e\u003cp\u003e- incoming Core protocol connections from untrusted sources to the broker\u003c/p\u003e\u003cp\u003e- outgoing Core protocol connections from the broker to untrusted targets\u003c/p\u003e\u003cp\u003eThis issue affects:\u003c/p\u003e\u003cp\u003e- Apache Artemis from 2.50.0 through 2.51.0\u003c/p\u003e\u003cp\u003e- Apache ActiveMQ Artemis from 2.11.0 through 2.44.0.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to Apache Artemis version 2.52.0, which fixes the issue.\u003c/p\u003e\u003cp\u003eThe issue can be mitigated by one of the following:\u003c/p\u003e\u003cp\u003e- 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.\u003c/p\u003e\u003cp\u003e- 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.\u003c/p\u003e\u003cp\u003e- Implement and deploy a Core interceptor to deny all Core downstream federation connect packets. Such packets have a type of (int) -16 or (byte)\u0026nbsp;0xfffffff0. Documentation for interceptors is available at\u0026nbsp;\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html\\\"\u003ehttps://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html\u003c/a\u003e.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-306\", \"description\": \"CWE-306 Missing Authentication for Critical Function\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2026-03-17T15:29:53.714Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-27446\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-17T15:29:53.714Z\", \"dateReserved\": \"2026-02-19T16:10:53.921Z\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"datePublished\": \"2026-03-04T08:48:48.199Z\", \"assignerShortName\": \"apache\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.