# CVE-2018-16848: OpenStack Mistral DoS

Source: https://junglewise.ai/threats/cve-2018-16848-openstack-mistral-dos  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-06-15  
License: CC BY 4.0 with a link back

CVE-2018-16848 · Severity: low · CVSS 3.1 · Published 2020-06-15

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.

Technologies: [mistral (PyPI)](https://junglewise.ai/threats/technologies/pypi-mistral). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2018-16848 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2018-16848 being exploited in the wild.

**How severe is CVE-2018-16848?** Low severity, with a CVSS score of 3.1, published 15 June 2020.

**Which products and versions are affected?** mistral (PyPI) ECOSYSTEM:introduced=0,fixed=10.0.0, ECOSYSTEM:introduced=0,fixed=7.0.4.

**Is there a fix for CVE-2018-16848?** Yes. mistral (PyPI): upgrade to 10.0.0, 7.0.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2018-16848?** Check whether you run mistral (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- mistral (PyPI): upgrade to 10.0.0, 7.0.4 or later

  ```sh
  pip install "mistral>=10.0.0"
  ```


## Affected products

- mistral (PyPI) ECOSYSTEM:introduced=0,fixed=10.0.0, ECOSYSTEM:introduced=0,fixed=7.0.4

## Identifiers

- CVE-2018-16848
- GHSA-443j-6p7g-6v4w
- PYSEC-2020-240

## Related threats

- [OpenStack Mistral remote code execution via policy bypass](https://junglewise.ai/threats/cve-2026-41283-openstack-mistral-remote-code-execution-via-policy-bypass)
- [openstack-mistral Discloses the presence of arbitrary files within the filesystem](https://junglewise.ai/threats/cve-2018-16849-openstack-mistral-discloses-the-presence-of-arbitrary-files)