# CVE-2021-20289: libresteasy-java: A flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final.The endpoint class and method names are re...

CVE-2021-20289 is fixed in 2 products on 1 platform, first by libresteasy-java 3.6.2-2ubuntu0.20.04.1~esm1, released October 8, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-20289
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0140
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 26, 2021

## Description

A flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final.The endpoint class and method names are returned as part of the exceptionresponse when RESTEasy cannot convert one of the request URI path or queryvalues to the matching JAX-RS resource method's parameter value. Thehighest threat from this vulnerability is to data confidentiality.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libresteasy-java Ubuntu 20.04 LTS (focal) | 3.6.2-2ubuntu0.20.04.1~esm1 | [libresteasy-java 3.6.2-2ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libresteasy-java-3.6.2-2ubuntu0.20.04.1-esm1.md) | Oct 8, 2024 |
| Linux | libresteasy-java Ubuntu 22.04.1 LTS (jammy) | 3.6.2-2ubuntu0.22.04.1~esm1 | [libresteasy-java 3.6.2-2ubuntu0.22.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libresteasy-java-3.6.2-2ubuntu0.22.04.1-esm1.md) | Oct 8, 2024 |
| Linux | libresteasy-java Ubuntu 24.04.5 LTS (noble) | 3.6.2-2ubuntu0.24.04.1~esm1 | [libresteasy-java 3.6.2-2ubuntu0.24.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libresteasy-java-3.6.2-2ubuntu0.24.04.1-esm1.md) | Oct 8, 2024 |
| Linux | libresteasy-java Ubuntu 24.10 (oracular) | 3.6.2-2ubuntu0.24.10.1 | [libresteasy-java 3.6.2-2ubuntu0.24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libresteasy-java-3.6.2-2ubuntu0.24.10.1.md) | Jan 16, 2026 |
| Linux | libresteasy-java Ubuntu 25.04 (plucky) | 3.6.2-3ubuntu0.25.04.1 | [libresteasy-java 3.6.2-3ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libresteasy-java-3.6.2-3ubuntu0.25.04.1.md) | Jan 16, 2026 |
| Linux | libresteasy3.0-java Ubuntu 18.04.6 LTS (bionic) | 3.0.26-1~18.04.1~esm1 | [libresteasy3.0-java 3.0.26-1~18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libresteasy3.0-java-3.0.26-1-18.04.1-esm1.md) | Oct 8, 2024 |
| Linux | libresteasy3.0-java Ubuntu 20.04 LTS (focal) | 3.0.26-1ubuntu0.1~esm1 | [libresteasy3.0-java 3.0.26-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libresteasy3.0-java-3.0.26-1ubuntu0.1-esm1.md) | Oct 8, 2024 |
| Linux | libresteasy3.0-java Ubuntu 22.04.1 LTS (jammy) | 3.0.26-3ubuntu0.1 | [libresteasy3.0-java 3.0.26-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libresteasy3.0-java-3.0.26-3ubuntu0.1.md) | Oct 8, 2024 |
| Linux | libresteasy3.0-java Ubuntu 24.04.5 LTS (noble) | 3.0.26-6ubuntu0.24.04.1 | [libresteasy3.0-java 3.0.26-6ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libresteasy3.0-java-3.0.26-6ubuntu0.24.04.1.md) | Oct 8, 2024 |
| Linux | libresteasy3.0-java Ubuntu 24.10 (oracular) | 3.0.26-6ubuntu0.24.10.1 | [libresteasy3.0-java 3.0.26-6ubuntu0.24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libresteasy3.0-java-3.0.26-6ubuntu0.24.10.1.md) | Jan 16, 2026 |
| Linux | libresteasy3.0-java Ubuntu 25.04 (plucky) | 3.0.26-6ubuntu0.25.04.1 | [libresteasy3.0-java 3.0.26-6ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libresteasy3.0-java-3.0.26-6ubuntu0.25.04.1.md) | Jan 16, 2026 |

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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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