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🐍 PyPI
Not in CISA KEV
HIGH severity

CVE-2018-16849 — mistral

HIGHFix: openstack/mistral@2309e52

CVE-2018-16849 is a high-severity (CVSS 7.5) Information Exposure vulnerability in mistral. A fix is available for mistral — see the affected versions and patch details below.

openstack-mistral Discloses the presence of arbitrary files within the filesystem

Also known asGHSA-fqw7-c6vr-q29mPYSEC-2018-92
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs75th percentile — riskier than 75% of all scored CVEsHighest risk
0.00%0.67%1.35%2.02%0.1%1.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍mistral

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

A flaw was found in openstack-mistral. By manipulating the SSH private key filename, the std.ssh action can be used to disclose the presence of arbitrary files within the filesystem of the executor running the action. Since std.ssh private_key_filename can take an absolute path, it can be used to assess whether or not a file exists on the executor's filesystem.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPImistralall versions7.0.1pip install --upgrade 'mistral==7.0.1'

Affected Products

1 product · 1 configurations
Application
openstack-mistralredhat
< 7.0.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mistral, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update mistral to 7.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-16849 is resolved across your whole dependency graph.

  3. Workarounds

    Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate
ProductFixed inAdvisory
Red Hat OpenStack Platform 13.0 (Queens)instack-undercloud-0:8.4.6-6.el7ostRHBA-2019:0448

Frequently Asked Questions

A flaw was found in openstack-mistral. By manipulating the SSH private key filename, the std.ssh action can be used to disclose the presence of arbitrary files within the filesystem of the executor running the action. Since std.ssh private_key_filename can take an absolute path, it can be used to assess whether or not a file exists on the executor's filesystem.
O3 Security · Impact-Aware SCA

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CVE-2018-16849: mistral — Fixed in 7.0.1