# CVE-2018-16848: mistral-api: A Denial of Service (DoS) condition is possible in OpenStack Mistral in versions up to and including 7.0.3

CVE-2018-16848 is fixed in 6 products on 1 platform, first by mistral-api 6.0.0-0ubuntu1.1+esm1, released June 15, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-16848
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0118
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 15, 2020

## Description

A Denial of Service (DoS) condition is possible in OpenStack Mistral in versions up to and including 7.0.3. Submitting a specially crafted workflow definition YAML file containing nested anchors can lead to resource exhaustion culminating in a denial of service.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mistral-api Ubuntu 18.04.6 LTS (bionic) | 6.0.0-0ubuntu1.1+esm1 | [mistral-api 6.0.0-0ubuntu1.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mistral-api-6.0.0-0ubuntu1.1-esm1.md) | Jun 15, 2020 |
| Linux | mistral-common Ubuntu 18.04.6 LTS (bionic) | 6.0.0-0ubuntu1.1+esm1 | [mistral-common 6.0.0-0ubuntu1.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mistral-common-6.0.0-0ubuntu1.1-esm1.md) | Jun 15, 2020 |
| Linux | mistral-engine Ubuntu 18.04.6 LTS (bionic) | 6.0.0-0ubuntu1.1+esm1 | [mistral-engine 6.0.0-0ubuntu1.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mistral-engine-6.0.0-0ubuntu1.1-esm1.md) | Jun 15, 2020 |
| Linux | mistral-event-engine Ubuntu 18.04.6 LTS (bionic) | 6.0.0-0ubuntu1.1+esm1 | [mistral-event-engine 6.0.0-0ubuntu1.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mistral-event-engine-6.0.0-0ubuntu1.1-esm1.md) | Jun 15, 2020 |
| Linux | mistral-executor Ubuntu 18.04.6 LTS (bionic) | 6.0.0-0ubuntu1.1+esm1 | [mistral-executor 6.0.0-0ubuntu1.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mistral-executor-6.0.0-0ubuntu1.1-esm1.md) | Jun 15, 2020 |
| Linux | python-mistral Ubuntu 18.04.6 LTS (bionic) | 6.0.0-0ubuntu1.1+esm1 | [python-mistral 6.0.0-0ubuntu1.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-mistral-6.0.0-0ubuntu1.1-esm1.md) | Jun 15, 2020 |

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Data as of 2026-11-07T18:46:35Z 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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