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 l
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | mistral | < 7.0.4 | 7.0.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-16848
- https://github.com/openstack/mistral/commit/eac23d9e774f658f9d4743c99aa2743eb104c3f9
- https://bugs.launchpad.net/mistral/+bug/1785657
- https://bugzilla.redhat.com/show_bug.cgi?id=1645332
- https://github.com/openstack/mistral
- https://github.com/pypa/advisory-database/tree/main/vulns/mistral/PYSEC-2020-240.yaml
- https://github.com/advisories/GHSA-443j-6p7g-6v4w
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- Python (PyPI)
- Package
mistral- Disclosed
- 15.06.2020
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-443j-6p7g-6v4w - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2020-240 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: mistral
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 11.2018 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 2
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 1
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 1
-
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 l this entry
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