# CVE-2021-26291: libmaven3-core-java: Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surp...

CVE-2021-26291 is fixed in 2 products on 1 platform, first by libmaven3-core-java 3.6.0-1~18.04.1ubuntu0.1~esm1, released April 23, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-26291
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0869
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 23, 2021

## Description

Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmaven3-core-java Ubuntu 18.04.6 LTS (bionic) | 3.6.0-1~18.04.1ubuntu0.1~esm1 | [libmaven3-core-java 3.6.0-1~18.04.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmaven3-core-java-3.6.0-1-18.04.1ubuntu0.1-esm1.md) | Apr 23, 2021 |
| Linux | libmaven3-core-java Ubuntu 20.04 LTS (focal) | 3.6.3-1ubuntu0.1~esm1 | [libmaven3-core-java 3.6.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmaven3-core-java-3.6.3-1ubuntu0.1-esm1.md) | Apr 23, 2021 |
| Linux | libmaven3-core-java Ubuntu 22.04.1 LTS (jammy) | 3.6.3-5ubuntu0.1~esm1 | [libmaven3-core-java 3.6.3-5ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libmaven3-core-java-3.6.3-5ubuntu0.1-esm1.md) | Apr 23, 2021 |
| Linux | maven Ubuntu 18.04.6 LTS (bionic) | 3.6.0-1~18.04.1ubuntu0.1~esm1 | [maven 3.6.0-1~18.04.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-maven-3.6.0-1-18.04.1ubuntu0.1-esm1.md) | Apr 23, 2021 |
| Linux | maven Ubuntu 20.04 LTS (focal) | 3.6.3-1ubuntu0.1~esm1 | [maven 3.6.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-maven-3.6.3-1ubuntu0.1-esm1.md) | Apr 23, 2021 |
| Linux | maven Ubuntu 22.04.1 LTS (jammy) | 3.6.3-5ubuntu0.1~esm1 | [maven 3.6.3-5ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-maven-3.6.3-5ubuntu0.1-esm1.md) | Apr 23, 2021 |

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Data as of 2026-11-09T01:18:40Z 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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