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No exploitation reportedFix available

CVE-2026-27446

No exploitation reported by the sources we read.

  • Published2026-03-04
  • WeaknessCWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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 .

Timeline

dates in UTC
  1. 2026-03-0409:15CVE publishedNVD
  2. 2026-10-2523:12EPSS crossed 10 %FIRST EPSS

Versions per branch

NVD · OSV
Apache artemis
BranchAffectedFixed in
2.x≥ 2.11.0, ≤ 2.44.0no fix published
2.50= 2.50.0no fix published
artemis-server
BranchAffectedFixed in
2.x≥ 2.11.0, ≤ 2.44.0no fix published
artemis-server
BranchAffectedFixed in
2.x≥ 2.50.0, < 2.52.02.52.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA2 products

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apache Software Foundation Apache Artemisother versions: not affected

    package org.apache.artemis:artemis-serverhttps://repo.maven.apache.org/maven2

    Affected
    • ≥ 2.50.0, ≤ 2.51.0no fix statedsemver
  • Apache Software Foundation Apache ActiveMQ Artemisother versions: not affected

    package org.apache.activemq:artemis-serverhttps://repo.maven.apache.org/maven2

    Affected
    • ≥ 2.11.0, ≤ 2.44.0no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-03-17

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • activemqUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • activemqUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • activemqUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • activemqUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • activemqUbuntu:26.10all versions · no fixed version listed
  • activemqUbuntu:26.04:LTSall versions · no fixed version listed
  • activemqUbuntu:25.10all versions · no fixed version listed
  • activemqUbuntu:24.04:LTSall versions · no fixed version listed

105 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-27446 Red Hat Product Security138 products fixed · 3 known affected

    org.apache.artemis:artemis-server: org.apache.activemq:artemis-server: Apache Artemis, Apache ActiveMQ Artemis: Message injection and exfiltration due to missing authentication

    artemis-server as a component of Red Hat build of OptaPlanner 8 · artemis-server as a component of Red Hat Fuse 7 · artemis-server as a component of Red Hat Process Automation 7

  • RHSA-2026:53806 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security update

  • RHSA-2026:53646 Red Hat Product Security101 products fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update

  • RHSA-2026:53645 Red Hat Product Security102 products fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update

  • RHSA-2026:53644 Red Hat Product Security101 products fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security pdate

  • RHSA-2026:18054 Red Hat Product Security16 products fixed

    Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.6 security update

7 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:53806 · 1 productBefore applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://acce…
  2. Vendor fix Red Hat Product Security RHSA-2026:17668 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Siemens ProductCERT SSA-085541 · 1 productUpdate to Apache Artemis version 2.52.0 or later version
  4. Vendor fix CISA ICSA-26-134-09 · 1 productUpdate to Apache Artemis version 2.52.0 or later version
  5. Vendor fix Red Hat Product Security RHSA-2026:3957 · 1 productBefore applying the update, back up your existing installation, including all applications, configuration files, databases and database settings. The References section of this erratum contains a download link (you must log in to download the update).
  6. Workaround from the vendor Red Hat Product Security RHSA-2026:53806 · 1 productTo mitigate this issue, restrict Core protocol support on acceptors receiving connections from untrusted sources. The default "artemis" acceptor on port 61616 supports all protocols, including Core. Modify the acceptor URL to explicitly exclude the Core protocol using the "protocols" URL parameter.…

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-03-04
  • CNACVSS 4.09.3known since 2026-10-23
  • CNACVSS 3.19.1known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNAweakness (CWE)CWE-306known since 2026-10-23
  • FIRST EPSSEPSS score11.4 %read 2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryCRITICAL2026-03-04

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-03-04
Last Modified
2026-09-18
NVD status
Modified
GitHub Advisory
GHSA-fw88-pf9m-p947

Frequently asked questions

What is CVE-2026-27446?

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 .

Is CVE-2026-27446 actively exploited?

Active exploitation of CVE-2026-27446 has not been confirmed. Its EPSS score was 11.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-27446?

CVE-2026-27446 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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