# CVE-2021-26117: activemq: The optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server

CVE-2021-26117 is fixed in 2 products on 1 platform, first by activemq 5.15.8-2~18.04.1~esm1, released November 28, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-26117
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.1133
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 27, 2021

## Description

The optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server. In this case, for Apache ActiveMQ Artemis prior to version 2.16.0 and Apache ActiveMQ prior to versions 5.16.1 and 5.15.14, the anonymous context is used to verify a valid users password in error, resulting in no check on the password.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | activemq Ubuntu 18.04.6 LTS (bionic) | 5.15.8-2~18.04.1~esm1 | [activemq 5.15.8-2~18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-activemq-5.15.8-2-18.04.1-esm1.md) | Nov 28, 2023 |
| Linux | activemq Ubuntu 20.04 LTS (focal) | 5.15.11-1ubuntu0.1~esm1 | [activemq 5.15.11-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-activemq-5.15.11-1ubuntu0.1-esm1.md) | Nov 28, 2023 |
| Linux | libactivemq-java Ubuntu 18.04.6 LTS (bionic) | 5.15.8-2~18.04.1~esm1 | [libactivemq-java 5.15.8-2~18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libactivemq-java-5.15.8-2-18.04.1-esm1.md) | Nov 28, 2023 |
| Linux | libactivemq-java Ubuntu 20.04 LTS (focal) | 5.15.11-1ubuntu0.1~esm1 | [libactivemq-java 5.15.11-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libactivemq-java-5.15.11-1ubuntu0.1-esm1.md) | Nov 28, 2023 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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