CVE-2026-27446
criticalpriority · track · 39OT risk · elevatedEPSS 0.012 · 67 %ileDEEUNLUSEPSS · scored 2026-10-22
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 .
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedOpcenter RDnLsiemens_psirt
Update to Apache Artemis version 2.52.0 or later version
- FixedOpcenter RDnLcisa_csaf_ot
Update to Apache Artemis version 2.52.0 or later version
- MitigationOpcenter RDnLsiemens_psirt
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 .
- MitigationOpcenter RDnLcisa_csaf_ot
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 .
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.1–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (55)
Products and version ranges known to be affected.
- Red Hat Enterprise Linux Apache Camel for Spring Bootall versionscert_bundDEcpe:/o:redhat:enterprise_linux:apache_camel_for_spring_boot
advisories (5)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0147Kwetsbaarheden verholpen in Siemens-productenNL2026-05-13csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in verschillende (OT-)producten. Het gaat onder andere om producten in de Siemens RUGGEDCOM-, SCALANCE-, SIMATIC-, SIMIT-, SINAMICS-, SIPROTEC-, SENTRON- en Solid Edge-productreeksen.
- SSA-085541SSA-085541: Missing Authentication in Critical Function in ActiveMQ Artemis (CVE-2026-27446) in Opcenter RDnL2026-05-12csaf · siemens_psirtDE
Opcenter RDnL is affected by missing authentication in critical function in ‘ActiveMQ Artemis’. An unauthenticated attacker within the adjacent network could 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 availability impacts or message injection into any queue via the rogue broker. Breaking the integrity of a message has a low impact due to missing auto refresh functionality and it does not contain any confidential information. ActiveMQ Artemis has released a new version and Siemens recommends to update to the latest version.
- WID-SEC-W-2026-0591Apache ActiveMQ/Artemis: Mehrere SchwachstellenDeutsch2026-03-03csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache ActiveMQ/Artemis ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.
- GHSA-fw88-pf9m-p947Apache Artemis and Apache ActiveMQ Artemis are Missing Authentication for Critical Functions2026-03-04ghsa · osvUS
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 either 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.
- ICSA-26-134-09Siemens Opcenter RDnL2026-05-12icsa · cisa_csaf_otUS
Opcenter RDnL is affected by missing authentication in critical function in ‘ActiveMQ Artemis’. An unauthenticated attacker within the adjacent network could 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 availability impacts or message injection into any queue via the rogue broker. Breaking the integrity of a message has a low impact due to missing auto refresh functionality and it does not contain any confidential information. ActiveMQ Artemis has released a new version and Siemens recommends to update to the latest version.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (21)
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/03/03/4cnnvd
- http://www.openwall.com/lists/oss-security/2026/03/04/1cnnvd
- https://access.redhat.com/security/cve/cve-2026-27446cnnvd
- https://artemis.apache.org/Patchcnnvd
- https://lists.apache.org/thread/jwpsdc8tdxotm98od8n8n30fqlzoc8ggcnnvd
- https://lists.apache.org/thread/jwpsdc8tdxotm98od8n8n30fqlzoc8ggenisa_euvd
- http://www.openwall.com/lists/oss-security/2026/03/03/4Mailing ListThird Party Advisorynvd
- http://www.openwall.com/lists/oss-security/2026/03/04/1Mailing ListThird Party Advisorynvd
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